Definition: If food or drink is off, it is not now fresh and good to eat or drink. Level: B2
这牛奶闻起来坏了。
This milk smells ___off.
谁知道这食物是不是坏了？
Who knows if the food isn't ___off?
肉已经变质了，所以我们不能吃。
The meat has gone ___off, so we can't eat it.
