Let me go ahead and just sort the left half at the moment.

那我现在先只对左半部分进行排序。

哈佛公开课 - 计算机科学课程节选

I needed about an half hour ahead start on him in the office in order to be sufficiently prepared to visit with him which I did every morning shortly after he arrived.

我需要在他之前,半个小时前就开始工作,为的是做好充分准备,跟他谈话,我每天早上,他到达办公室后都要跟他谈。

普林斯顿公开课 - 国际座谈会课程节选