1.space telescope 太空望远镜

例句:We put it on the space telescope before we launched it.

我们把它装到太空望远镜上，发射出去了。

2.Based on 基于...

例句:The selection process is based on rigorous tests of competence and experience.

选拔过程是基于对能力和经验的严格测试。

3.a pair of 一对；一双

例句:He put on a pair of short pants and an undershirt.

他穿上了一条短裤和一件汗衫。

4.hunt for 搜寻；寻找

例句:After a long hunt for him, we saw him emerging from the crowd.

我们找了他半天之后，看见他从人群里出来了。