1. a host of 大量
I believe that this view is mistaken and that it leads to a host of entirely unnecessary difficulties.
我相信這種看法是錯誤的，而且它導致一大堆完全不必要的困難chxcDQ!8|==4W。

2. a contingent of 一支……的隊伍
A contingent of qualified space scientists and technicians has come to the fore.
培育了一支素質(zhì)好、技術水平高的航天科技隊伍[~pU(%PLi*9wdy。

3. as a deterrent to 最為對……的威懾
I believed that death penalty would act as a deterrent to crime.
我相信死刑會對犯罪行為起到威懾作用O~5^dgo%,w~+r%P~Uv6。

4. back up 支持
I can find the data to back up that claim.
我能找到證據(jù)來支持這種說法k[2&9(-F2twQaB。