In order to explain it-- I had to write down the binomial distribution to explain it properly.

要解释这一点,我要先在黑板上写一个二项分布,以便于解释清楚这个问题

耶鲁公开课 - 金融市场课程节选

I had to write some long papers, especially for French classes.

我必须要写一些长篇，尤其是法语课论文。

选择国际学的理由 - SpeakingMax英语口语达人

It was very well received. You decided, "for my next project I am going to write about my life." You've had a hard life, by the way.

你决定：，“我的下一本书要写我的生活”,顺便提一下，你的日子很贫苦。

耶鲁公开课 - 1945年后的美国小说课程节选