重点讲解：
1. in the face of 面对；在…面前；
In the face of difficulties, he's completely unafraid.
他在困难面前毫不怯懦。
2. search for 搜寻；搜索；搜查；寻求；
With the help of a dog, the police searched for two hours.
在一条狗的帮助下，警察搜查了两个小时。
3. test out 对…进行彻底检验；
His work is to test out new designs of cars before they are put on the market.
他的工作是在新设计的汽车投入市场之前对它们进行检验。
4. in attendance 到（某地）；出席（某活动）；
At the funeral all next of kin were in attendance.
所有的亲属都参加了葬礼。