187. take the lead (in doing something): 带头做某事 He always takes the lead when we play games. 我们玩游戏的时候总是他领头。
188. on strike: 罢工 We’re on strike because the company hasn’t improved our wages. 我们罢工是因为公司没有提高我们的工资。 The workers went on strike against low wages. 工人们为反对低薪待遇而举行了罢工。
189. life span: 寿命 attention span: 集中注意力的时间 The life span of a butterfly is short. 蝴蝶的寿命很短。 Most 2-year-olds have a very short attention span. 大部分两岁的幼儿注意力集中的时间都很短。
