那是必定要发生的。

It will happen, as sure as a gun.

《新英汉大辞典》

我离家前必定要把所有的窗子都关好。

I made a point of closing all the windows before leaving the house.

《牛津词典》

所以你必不下所上的床，必定要死。

Because you have done this, you will never leave the bed you are lying on. You will certainly die!

youdao

I study speech, I study speeches, and if I do so, and if I keep thinking about it in a variety of ways, all sorts of frameworks jostle for attention.

我就必定要研究话语，如果我想要从尽可能多的角度研究它，那么各式各样的的语言结构令我眼花缭乱。

耶鲁公开课 - 文学理论导论课程节选

It's got to have activity to play itself out as melody.

把它表现成旋律也必定要很活跃

耶鲁公开课 - 聆听音乐课程节选

The lists of reasons to kill himself were "the slings and arrows of outrageous fortune," "a sea of troubles," and "the heartache in the thousand natural shocks that flesh is heir to."

一张是要自杀的原因,“命运的种种捉弄和折磨”,“无穷尽的烦恼“,”血肉之躯必定要承受无数的,锥心之痛“

耶鲁公开课 - 心理学导论课程节选