They can't stay for long.

他们不能停留很长时间。

youdao

I can't stay for long as I have an appointment in 20 minutes' time.

20分钟以后我还有一个约会，所以我不太呆久了。

youdao

Don't stay out in the sun for too long—you can't be too careful.

别在太阳底下待得太久，你得尽量小心。

《牛津词典》

"I will come back just after a year, because I can't stay home for that long, " she added.

BBC: May's leap is just enough

You can't really expect things to stay the same for very long, which turns every outing into an exploration.

CNN: Tokyo: A local's view