讲解文本：
brag 吹牛，自夸，夸口 Don't brag about what you're going to do. Do something first. 先别吹你要做什么，做出点事情来。 He often brags about how well he plays football. 他常常自夸他足球踢得如何如何好。
疯狂练习吧！
