lt's=lt is
它是
双语例句：
1.B：lt's cloudy and gray again.
天色又多云灰暗了。
2.lt's not like Jim to be late for class. He regards time as the most important thing inlife.
上课迟到不像吉姆的一贯作风,他把时间看作是生命中最重要的.
3.We initially had an aux radio on every tank in the company, but the LT's had gone down while we were in Saudi, and since I was his wingman , I had to fess mine up.
起初我们连里的每辆坦克都有一个辅助的无线电，而中尉的那个从我们还在沙特的时候就坏了，由于我是他的僚车，我不得不将自己的贡献了出去。
