Knock on wood we have never messed up and I've been doing this for over 30 years.

上天保佑，我们从没搞砸过。我做这个已经超过30年了。

So far, knock on wood, I haven't.

到目前为止，还没有。

Thank goodness it's all behind me, knock on wood.

谢天谢地，一切都在我身后。

So how did it happen that people all over the world knock on wood or avoid stepping on sidewalk cracks?

那么世界各地的人们敲击木头或避免踩到人行道上的裂缝，又是如何发生的？

Knock on wood I haven't completely given you the wrong information!

敲木头我没有完全给你错误的信息！

And you know what, luckily, knock on wood, it didn't hurt anybody, but it did unfortunately go through the roof of that house.

你知道吗，幸运的是，谢天谢地，它没有伤到任何人，但不幸的是它穿过了那所房子的屋顶。

My whole family's okay, knock on wood.

上天保佑 我全家人都很好。

So to start with, let's look at: " knock on wood" .

那么首先，让我们看看：“敲木头”。

But since I've been doing celery juice, knock on wood, I've been good.

但是自从我一直在做芹菜汁，敲木头，我一直很好。

Why do so many people knock on wood, for example?

例如，为什么那么多人敲木头？

Touching or knocking on wood is said to date back to Celtic rituals that were designed to rouse the tree gods and call on their protection.

据说，触摸或敲击木头可以追溯到凯尔特人的仪式，目的是唤醒树神并请求他们的保护。

So knock on wood I hope, you know, I'll be able to die in peace.

所以，我希望，你知道，我能够平静地死去。

The " knock on wood" means I hope I don't get sick in the future either.

“knock on wood”的意思是希望自己以后也不要生病。

For example: " I have not been sick this year with the flu, knock on wood" .

例如：“我今年没有因为流感而生病，敲木头”。

" Oh, it went well." Okay, so that's why we knock on wood, it's a superstition.

-“哦，很顺利。 ” 好吧，这就是我们敲木头的原因， 这是一种迷信。

Knocking on wood is thought to come from the folklore of the ancient indo-europeans or possibly people who predated them who believed that trees were home to various spirits.

人们认为敲木头是来自古代印欧人的民间传说，或者可能出自那些认为树木是各种神灵家园的人。

" To knock on wood" means to take your hand and hit wood, a type of material that comes from trees.

“敲木头” 的意思是用手敲木头，木头是一种来自树木的材料。

Finally, William (William) in China wants to know the meaning of the idiom, or expression, " to knock on wood" .

最后，中国的威廉（William）想知道“敲木头”这个成语或表达的意思。

" Knock on wood" is an idiom that we use when we are hoping that something good will happen, or something bad will not happen that;it hasn't happened yet.

“Knock on wood”是我们希望好事发生或坏事不会发生时使用的成语；它还没有发生。

Imagine if I want to go on a picnic, and I'm a little afraid about rain, I might say: " Oh, you know, today's supposed to be a very sunny day. Knock on wood." I'm knocking on wood to prevent rain.

想象一下，如果我想去野餐，而且我有点怕下雨， 我可能会说：“哦， 你知道，今天应该是一个非常晴朗的日子。 敲木头。 ” 我正在敲木头以防下雨。