重点讲解：
1. at the request of 应…的请求；按照…的要求；
At the request of delegations, there was a brief recess.
在一些代表团的要求下，进行了简短的休息。
2. serve as 用作；可当…使用；充作；
Let these words of mine serve as a warning to you.
我说的这些就当给你打预防针吧。
3. go through 重复；例行做；
It's a formality which we have to go through.
它是我们必须办理的一项手续。
4. no matter what 不管怎样；无论如何；
He's decided to leave tomorrow, no matter what.
不管发生什么事，他已决定明天走。