人生就应该是快乐的，要抓住每一天，孩子们，让你们的生活变得非凡起来。Carpe diem. Seize the day, boys. Make your lives extraordinary.他在学校开通广播，以提高孩子们的警觉性。He introduced radio to the school to increase the children's awareness.男孩子们对我不感兴趣令我很烦恼。It bothered...
In the Middle Ages the term "drab" denoted a very simple type of woollen cloth which was used by peasants to make their clothes.中世纪时，drab（“本色布”）一词指的是一种农民用来制衣的非常普通的羊毛织物。The union of two sets A and B is denoted by AUB.两个集合...