This was a forbidden area for foreigners.

这是一个禁止外国人入内的地区。

《柯林斯英汉双解大词典》

To whom should she mention me if I am a forbidden topic in the house?

如果在那个家里我是一个禁止谈论的话题，她又能跟谁提到我呢？

youdao

She went into a lonely forbidden chamber where no one was allowed to come, and poisoned a beautiful apple.

她走进一间禁止任何人进入的孤寂的房间，在一个美丽的苹果里下了毒。

youdao

"I learned by studying, that suicide is forbidden in Islam, and killing of innocents is forbidden in Islam, and even cutting down trees in a defensive battle is forbidden.

VOA: standard.2010.05.21

If so, is sex a negative thing forbidden by God?

如果真的如此，是否性是被上帝禁止的？

耶鲁公开课 - 旧约导论课程节选

Every dream you have is a certain wish you have even though it might be a forbidden wish that you wouldn't wish to have, you wouldn't want to have.

你做的每一个梦都是你所抱有愿望的展现,即使这是个你并不想拥有的，被禁止的愿望。

耶鲁公开课 - 心理学导论课程节选

However, many Maliki jurists have forbidden a Muslim from granting power of attorney to an infidel in a dispute with another Muslim.

CENTERFORSECURITYPOLICY: Center For Security Policy

This might happen when a Shariah-compliant company in a Shariah-compliant mutual fund acquires a forbidden company, the main business of which is in a forbidden industry such as finance or hog farming.

CENTERFORSECURITYPOLICY: Shariah��s Black Box

Or could it have been that in December 1988, even in such a permissive time and place, Daphne suspected that she had somehow managed to cross a forbidden line into a social or cultural or family territory that was taboo?

NPR: One Boy's Heroism in the Face of AIDS