敲敲木头，等于把霉运敲掉

<非正式>老天保佑；敲木头

knock for a loop───猛击；把…醉倒；给…极好的印象；使惊慌失措

knock it off───停止做；住口，别再讲下去了

knock on───撞击撞出；敲击（门、窗）

lock on to───(用雷达或类似手段)定位跟踪(目标)

log of wood───原木

logs of wood───原木

knock on the head───敲打头部

knock 'em dead───白日蓝梦

Stockwood───粗木

My computer has never given me any trouble - knock on wood.───我的电脑从来没给我带来任何麻烦,但愿能一直这样.

And the new system runs extremely smoothly, without any major problems or instabilities (knock on wood).───并且新系统运行平稳，完全没有任何问题和不稳定(运气不错)。

I almost got hit by a car. Knock on wood.───我差一点就被一台车给撞到, 真是好险.

knock on something made of wood to keep from having bad luck.───敲木头做的东西以防止有坏运气。

I prefer to knock on wood.───我喜欢敲在木头上。

Always ready to knock on wood, throw salt over my shoulder, bite my tongue, cross my fingers.

Hopefully, knock on wood, Lieby is going to be in there most of the time.

I haven't had a cold all winter, knock on wood.

Bess: I've never had a computer virus, knock on wood.

We haven't missed a deadline yet, knock on wood.