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。

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。