要求我们中学毕业前掌握基础英语语法。

We are asked to grasp the elements of English grammar before we finish middle school.

youdao

乐天雇员需要在2012年前掌握英语，以避免被开除的命运。

Employees at Rakuten will need to master English by 2012 to avoid facing the sack.

youdao

现在，如果跨国婚姻的另一方来自较穷的国家，则要求移居德国前掌握一些德语。

Spouses from poorer countries must now acquire a smattering of German before arrival.

youdao

I don't expect you'll all immediately grab it, but you will need to understand it before the quiz comes along.

我不期望你们马上就能掌握，但是你们需要在,考试前弄懂它。

麻省理工公开课 - 计算机科学及编程导论课程节选