【今日内容】

中文有个成语叫做“千钧一发”。顾名思义就就是指用一根头发悬起千钧重物。千钧一发用来比喻极为紧急，极其危险的关头，状况等等。So how should we put it in English? We might as well listen to the following sentence: We made it. We made this train by a hair. 我们赶上了，我们在这千钧一发之际赶上了火车。这句话中用了一个含有hair, h-a-i-r- 头发这个单词的一个短语来表述“千钧一发”，它是：by a hair.我们可以想象火车还有一秒钟就要开了，we will miss the train;但是就在这一秒钟之内，we catch the train. So , how lucky we are! 可见当时情况是多么的紧急呀!Let's look at one more sentence: He rushed up bravely by a hair. 他在这千钧一发的紧急关头冲了上去。

【课堂总结】

在今天的口语课堂上，我们学了“千钧一发”的表达：by a hair. It means " at a critical moment"