例句:In any case, separation of the two viewpoints is mandatory.
无论如何，把这两种观点分开是必不可少的。

2.depend on 依靠；依赖
 

例句:We depend on the newspapers for information about what is happening.
我们依凭报纸获悉所发生的事情。 

3.leave office 退休；卸任

例句:They told me Mr.Smith would leave office in one month.
他们告诉我史密斯先后将于一个月以后退休。

4.open up 打开；建立

例句:They decided to open up an office in town.
他们决定在市区设立一个办事处。