敌军显示出进攻的迹象，部队不得不进入戒备状态。

Warnings of an enemy attack forced the troops onto the defensive.

《牛津词典》

但规模意味着不得不进入中国市场。

But scale means that you've got to be in China.

youdao

假如他不出来，我们就不得不进入了。

If he won't come out, I guess we'll just have to go in.

youdao

You can read the details of this, which are not fascinating, but we'll get through this and move onto more interesting things.

你可以读到它的细节,虽然不太吸引人,但我们会越过这些,进入更有趣的话题

耶鲁公开课 - 1871年后的法国课程节选

It's not like you're going to show up. It's not like you go to a bar and you're like,

这和你随便露个面的感觉不太一样；这不像是你进入一个酒吧，然后说，

体验男女初次会面 - SpeakingMax英语口语达人

Milton's younger brother, Christopher, was already entering law school at this time, and it was clear, I guess, to everybody that John Milton, Jr. was not suited why that's the case.

弥尔顿的弟弟，克里斯多夫，在这时已经进入了法学院，我猜想，弥尔顿并不适合,我不清楚为什么）

耶鲁公开课 - 弥尔顿课程节选