急需一篇英语报道

例如描写一些事物，或者教同学们在生活中做一些事情，必须是全英文啊，而且没有语法错误，我是要在同学们面前念的，谢谢啦，

Evidence of extraterrestrial intelligence found
Maggie McKee, space editor

Trolling through a physics preprint server today, a colleague of mine spotted several highly intriguing papers.

One (pdf), from a project called Galaxy Zoo that invites volunteers to analyse and categorise galaxies in images from the Sloan Digital Sky Survey, reports on a strange new class of galaxy cluster (see images).
The team writes: "Upon detailed inspection, the morphologies of individual galaxies and close systems approximate the familiar geometric shapes of letters of the basic modern Latin alphabet. . . . the existence of these messages might indicate intelligent life beyond our own."

From the observed phrases ("Caution! Structure formation in progress", "Delays possible for 7 Gyr" and "We apologise for the inconvenience"), it's clear that these are cosmic road signs, and that the creator of the signs speaks the Queen's English (this I deduce both from the "s" in apologise and from the general politeness of the message).

But the incredible find raises an obvious question - what exactly is the nature of all this construction? I hope it's not a make-work project designed to get the cosmos out of a universal recession. The last thing I want to see in future images is a bunch of extraterrestrial construction workers standing by idly and shouting lewd remarks at passing star systems.

Another fascinating paper (pdf) makes a water-tight case that π, the ratio of a circle's circumference to its diameter, has changed over time. Noting that fundamental constants such as the fine-structure constant and the gravitational constant may have changed over time (changes that could spell trouble for the standard model of physics), Robert Scherrer at Vanderbilt University suggests that the fundamental dimensionless constant π might have changed, too.

His evidence? Measurements of the constant taken at various locations around the world over the past 4000 years (see table). QED.

But what could be responsible for the changes? Scherrer says he takes inspiration from string theory: "Consider the possibility that our observable universe is actually a 4-dimensional brane embedded in a 5-dimensional bulk. In this case, 'slices' of π can leak into the higher dimension, resulting in a value of π that decreases with time." Never mind that the table shows that π has actually been growing over time: "Since our theoretical model is clearly correct, this must be attributed to 4000 years of systematic errors."

And Scherrer doesn't just stop with π. "The next obvious possibility is the investigation of the time variation of e," he says, referring to a constant often known as Euler's number. "More speculatively, one might consider the possibility that the values of the integers could vary with time . . . . This possibility would have obvious implications for finance and accounting."

It's too late for Scherrer to win this year's Abel Prize in mathematics, but I think it would be a travesty if he didn't take home the award next year.

Not only does his work neatly explain the financial crisis the world now finds itself in, but it also accounts for the mystifying fact that $1 doesn't buy what it used to. The value of one has simply been changing over time!

Rarely have two such impressive pieces of scholarship appeared at all, much less on the same day. It's a wonderful time to be alive!

描写火箭发射的英文报道

A Long March rocket (simplified Chinese: 长征系列运载火箭; traditional Chinese: 长征系列运载火箭; pinyin: Chángzhēng xìliè yùnzài huǒjiàn) is any rocket in a family of expendable launch systems operated by the People's Republic of China. Development and design falls under the auspices of the China Academy of Launch Vehicle Technology. Confusingly, the rockets are abbreviated both LM- and CZ- in English. The rockets are named after the Long March of Chinese communist history. Contents [hide] 1 Payloads 2 Propellants 3 Specifications of Long March rocket family 4 Origins 5 Launch sites 6 Commercial launch services 7 Launch history 8 See also 9 References 10 External links [edit] Payloads The PRC launched its first satellite, known as Dong Fang Hong 1 ("the East is Red"), to Earth orbit on its own Long March space rocket on April 24, 1970, becoming the fifth nation to achieve independent launch capability. The Shenzhou spacecraft and Chang'e 1 lunar orbiter are also launched on the Long March rocket. The maximum payload for LEO is 9200 kg (CZ-2F), the maximum payload for GTO is 5200 kg (CZ-3B). The LM-5 variant will offer more payload in the future. [edit] Propellants As of 2003, the main stages and the booster rockets of Long March rockets use storable propellants with UDMH as fuel and dinitrogen tetroxide as the oxidizing agent. The upper stages (third stage) of Long March 3 rockets use YF-73 and YF-75 engines, in which use cryogenic fuel, Liquid hydrogen (LH2) as fuel and Liquid oxygen (LOX) as oxidizer. [edit] Specifications of Long March rocket family Model Status Stages Length (m) Max. diameter (m) Liftoff mass (t) Liftoff thrust (kN) Payload (LEO, kg) Payload (GTO, kg) Long March 1 Retired 3 29.86 2.25 81.6 1020 300 - Long March 1D Retired 3 28.22 2.25 81.1 1101 930 - Long March 2 Retired 2 31.17 3.35 190 2786 1800 - Long March 2C Active 2 35.15 3.35 192 2786 2400 - Long March 2D Active 2 33.667 (without shield) 3.35 232 2962 3100 - Long March 2E Retired 2 (plus 4 Strap-on boosters) 49.686 7.85 462 5923 9200 3500 Long March 2F Active 2 (plus 4 Strap-on boosters) 58.34 7.85 480 5923 8400 3370 Long March 3 Retired 3 43.8 3.35 202 2962 5000 1500 Long March 3A Active 3 52.3 3.35 241 2962 8500 2600 Long March 3B Active 3 (plus 4 Strap-on boosters) 54.84 7.85 425.5 5924 12000 5200 Long March 3C In development 3 (plus 2 Strap-on boosters) 54.84 7.85 345 4443 - 3800 Long March 4A Retired 3 41.9 3.35 249 2962 4000 (SSO) 1500 Long March 4B Active 3 44.1 3.35 254 2971 4200 (SSO) 2200 [edit] Origins The Long March rocket is related to early versions of the Dongfeng missile (note that Dongfeng is the generic Chinese name for all of its land ICBMs). However, like its counterparts in both the United States and in Russia, the differing needs of space rockets and strategic missiles have caused the development of space rockets and missiles to diverge. The main goal of a space rocket is to maximize payload, while for strategic missiles increased throw weight is much less important than the ability to launch quickly and to survive a first strike. This divergence has become clear in the next generation of Long March rockets which use cryogenic propellants in sharp contrast to the next generation of strategic missiles which are mobile and solid fuelled. [edit] Launch sites There are four launch centers in China. They are: Jiuquan Satellite Launch Center Xichang Satellite Launch Center Taiyuan Satellite Launch Center Wenchang Satellite Launch Center Most of the commercial satellite launches of Long March vehicles have been from Xichang Satellite Launch Center, located in Xichang, Sichuan province. Wenchang Satellite Launch Center in Hainan province is under expansion and will be the main launch center for the commercial satellite in future. Long March launches also take place from the more military oriented Jiuquan Satellite Launch Center in Gansu province from which the manned Shenzhou spacecraft also comes. Taiyuan Satellite Launch Center located in Shanxi province and focuses on the lauches of Sun-synchronous orbit satellites. [edit] Commercial launch services China markets launch services under the Great Wall Industrial Corporation. Its efforts to launch communications satellites were dealt a blow in the mid-1990s after the United States stopped issuing export licenses to companies to allow them to launch on Chinese launch vehicles out of fear that this would help China's military. In the face of this, Thales Alenia Space built the Chinasat-6B satellite with no components from the United States whatsoever. This allowed it to be launched on a Chinese launch vehicle without violating U.S. ITAR restrictions.[1] The launch, on a Long March 3B rocket, was successfully conducted on 5 July 2007. [edit] Launch history Main article: List of Long March rocket launches Early commercial launches had a spotty record. On January 26, 1995, a Long March 2E rocket veered off course two seconds after take-off from Xichang space center and exploded, killing at least six on the ground. On February 15, 1996, a similar failure during the launch of Intelsat 708 using a Long March 3B rocket resulted in an unknown number of casualties.[1] The rocket veered severely off course right after clearing the launch tower and landed in a rural village. Following the disaster, foreign media were sequestered in a bunker for five hours while, some have alleged, the Chinese military attempted to 'clean up' the damage. The Chinese Xinhua News Agency eventually reported 57 deaths, but the extent of damage observed by foreign journalists whilst being whisked away from the disaster site suggested there may have been at least 200 and upwards of 500 killed.[2] In the aftermath of the explosion, U.S. satellite makers shared information which allowed the Chinese to determine that the problem was in the welds. However, this sharing of information was later deemed illegal by the United States, and U.S. satellite maker Loral Space and Communications was fined $14 million by the U.S. government in 2002, while admitting no wrong-doing.[3] Since the improvements made after the 1996 accident, the reliability of the Long March rockets has been excellent, with zero failed launches. On October 15, 2003, the Long March 2F rocket successfully launched the Shenzhou 5 spacecraft/orbiter carrying the China's first astronaut into space, and on October 12, 2005, Shenzhou 6 with two astronauts; China became the third nation to send man into space on its own, after the Soviet Union/Russia and USA. On October 24, 2007, the Long March 3A successfully launched (18:05 GMT+8) the "Chang'e 1" lunar orbiting spacecraft from the Xichang Satellite Launch Center.