burn

burn out 燃尽;烧尽;熄灭

例句：

Fire officials let the fire burn itself out.

消防官员让火自行熄灭。

If he doesn't stop working so hard, he'll burn himself out.

他要是继续这样拼命工作，就会把自己累垮。

He might burn himself out and go to an early grave.

他可能会因为劳累过度而英年早逝。

I didn't want us to burn out.

我不想我们就这样燃尽。