保护好自己（非正式）

cover your back───遮住你的背

cover your tracks───掩盖你的行踪

cover your butt───盖上你的屁股

cover one's ass───遮住臀部

cover glass───保护玻璃

wave your arms───挥动你的手臂

lower your guard───放松警惕

cross your arms───交叉双臂

under your nose───在你眼皮子底下，在你面前

Anyway, I just shot that pilot to cover your ass.───不管怎么说，我刚刚为了救你一命杀了那个飞行员。

Moral of the story: when you try to cover your ass, it always comes back to get even with you.───故事的启示：如果你做了坏事后还想掩盖，你迟早会遭报应的。

LANCE: No one to cover your ass now, eh Tommy?───斯：汤米，现在没人罩你了巴？嘿嘿！

I had to lie to the professor to cover your ass.───我为了掩护你骗了教授。

No one to cover your ass now, eh Tommy?───汤米，现在没人罩你了吧？嘿嘿！

You should know all about that. Anyway, I just shot that pilot to cover your ass.───不管怎么说，我刚刚为了救你一命杀了那个飞行员。

Just play it safe, cover your ass, keep your head down.