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。

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。

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。