必须适应困难的情况。

Had to adapt to a difficult situation.

youdao

公路隧道进出口亮度的急剧变化会造成驾驶员视觉适应困难，严重时甚至导致交通事故。

The sharp variation of luminance at the entrance and exit of highway tunnel will cause the difficulty in visual adaptation of the driver, and even lead to traffic accidents.

youdao

最好是之后再做最困难的任务——在他们适应之后开始，但要在他们感到疲倦之前结束。

It's best to take on the most difficult task second—once they're settled, but before they get tired.

youdao

Was it hard to adjust to this school as a transfer student?

作为转校生，要适应这所学校困难吗？

留学生的适应期 - SpeakingMax英语口语达人