This area is always tender to the touch if the intestines are not functioning properly.

如果肠功能不正常的话，这个部位总是一按就痛。

《柯林斯英汉双解大词典》

It's true that when you've got a corpse, you've got all the parts there, but clearly they're not functioning properly.

当你面对一具死尸时,肉体所有的部分的确都摆在那里,但它们显然无法正常运作

耶鲁公开课 - 死亡课程节选

If your brain is not functioning properly, and a drug can make it work better, then it makes sense to take the pill.

BBC: Joanna Moncrief