keep off是什麼意思中文

例句：

I'm trying to keep off fatty foods.

我儘量不吃高脂肪食物。

They lit a fire to keep off wild animals.

他們點燃篝火防止野獸靠近。

It's best to keep off politics when my father's around.

我父親在場時最好不要談論政治。