请用英文介绍一种食物．

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食物．lemon, one of the citrus fruits citrus fruits, widely used edible fruits of plants belonging to Citrus and related genera of the family Rutaceae ( orange family). Included are the tangerine, citrange, tangelo, orange, pomelo, grapefruit , lemon , lime , citron , and kumquat . Almost all the species bearing edible fruits are small trees native to SE Asia, Indonesia, or Malaysia.
..... Click the link for more information. , from a tree (Citrus limon) of the family Rutaceae (orange orange, name for a tree of the family Rutaceae ( rue , or orange, family), native to China and Indochina, and for its fruit, the most important fresh fruit of international commerce. Its physical characteristics (especially the rich citric acid and vitamin content of the fruit) and history of cultivation are similar to those of the other types of citrus fruits , all of which are species of Citrus.
..... Click the link for more information. family), probably native to India. A small tree (to about 15 ft/5 m tall) with thorny branches and purple-edged white blossoms, it requires a mild, equable climate. The European crop is centered on the islands and coasts of the Mediterranean. In the United States, lemons are grown chiefly in California, especially in the southern seacoast areas, and in Florida. The trees are prolific, producing ripe fruit practically all the year. In the United States the fruit is cut from the tree while green, at a standard size, and the good lemons are placed in cool, dark rooms to ripen slowly; the skin grows yellow, thin, and pliable, and the quality of the fruit is better than when ripened on the tree. The imperfect fruit is manufactured into lemon oil, lemon juice, citric acid citric acid or 2-hydroxy-1,2,3-propanetricarboxylic acid, HO2CCH2C(OH)(CO2H)CH2CO2H, an organic carboxylic acid containing three carboxyl groups ; it is a solid at room temperature, melts at 153°C;, and decomposes at higher temperatures.
..... Click the link for more information. , pectin, and other useful products. Lemons have better preservative qualities than other citrus fruits and are thus more easily transported. The fruit is high in vitamin content (especially in ascorbic acid, or vitamin C) and has long been known as a preventive of scurvy. Lemons have a refreshing, acid flavor; they are in great demand for use in summer drinks, such as lemonade and punch, and are often preferred to vinegar as an ingredient in sauces and salad dressings. Lemon juice is the main source of citric acid, which is used by calico printers to keep the fabric clear of rusty stains from the machinery; it is also a domestic remedy for rust, ink, and mildew stains. Lemon oil, or the essential oil extracted from the skin, usually while green, is manufactured mostly in Italy and France. It is used in the making of flavoring extract (essential oil combined with alcohol), perfumes and cosmetics, and furniture polish. Lemon is classified in the division Magnoliophyta Magnoliophyta (măg'nōlēŏf`ətə), division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms .
..... Click the link for more information. , class Magnoliopsida, order Sapindales, family RutaceaeA spiny, Asian evergreen tree (Citrus limon) widely cultivated for its yellow, egg-shaped fruit.
Although we know neither where the lemon was first grown nor when it first came to Europe, we know from its name that it came to us from the Middle East because we can trace its etymological path. One of the earliest occurrences of our word is found in a Middle English customs document of 1420-1421. The Middle English word limon goes back to Old French limon, showing that yet another delicacy passed into England through France. The Old French word probably came from Italian limone, another step on the route that leads back to the Arabic word laymn or lmn, which comes from the Persian word lmn.

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jiaozi (chinese transliteration) or gyōza (japanese transliteration) and also known as mandu (korean), is a chinese dumpling, widely popular in china, japan, korea, as well as outside of east asia particularly in the united states. the corresponding chinese characters for "jiaozi" is a reference to the arrival of the chinese new year at midnight. according to the chinese calendar system, "tiangan dizhi" (heavenly stems and earthly branches) is used to designate the time in accordance to the chinese zodiac. "jiao" in chinese means "join," while "zi" is a reference to the first and eleventh hour (branch) of dizhi - where midnight is situated. jiaozi typically consist of a ground meat and/or vegetable filling wrapped into a thinly rolled piece of dough, which is then sealed by pressing the edges together or by crimping. jiaozi should not be confused with wonton: jiaozi have a thicker skin and a flatter, more oblate, double-saucer like shape (similar in shape to ravioli), and is usually eaten with a soy-vinegar dipping sauce (and/or hot chili sauce); while a wonton has a thinner skin, is sphere-shaped, and is usually served in broth.