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Optimists are wiser than their pessimistic peers, and bitterness keeps a person from being wise because they haven't learned lessons, Canadian researchers say. 加拿大研究人员称,整日忧心忡忡的人不如那些天性乐观的人聪明,因
今天我们要学的词是in-depth。 In-depth, 是深入的意思。美国民主党总统参选人奥巴马星期二就种族问题发表讲话。He invited Americans to examine in-depth the most difficult and divisive issue in American history, 他号
Diet fuels Olympic athletes An Olympic athlete goes through a strict training regimen as they prepare for the games. Everything they do is analyzed, from practice sessions to the food they eat. And everything they consume is closely monitored to ensu
By 1958, when people in lab coats started to pay attention to it, it had risen to 315 parts per million. 到1958年实验室人员开始重视这个问题的时候,那个数字已经上升到百万分之三百一十五。 Today it is over 360 parts