汉译英：1为了使环境更加整洁，我们最好不要乱扔垃圾；2放在门后面的垃圾发出一股臭味；3在阅览室里看书的那些学生，如此努力，以至于我很感动；4当我们到飞机场时，结果发现机票已经卖完了，所以我们不得不再等

1 in order to make the environment more orderly, we'd better don't litter,

2 in the garbage behind the door a bad smell,

3 in the reading-room reading those students, so hard that I was moved,

4 when we arrived at the airport, the results showed that ticket had been sold out, so we had to wait

1、1为了使环境更加整洁，我们最好不要乱扔垃圾

 To cause the environment to be neater, we should better do not throw trash

2、放在门后面的垃圾发出一股臭味；

Places the gate following trash to send out a stink

3、在阅览室里看书的那些学生，如此努力，以至于我很感动；

These students who reads in the reading room, so diligently, I am very affected

4、当我们到飞机场时，结果发现机票已经卖完了，所以我们不得不再等

 When we to airport, finally discovered that the airplane ticket had already sold-out  ，therefore we can not but wait again