Hints: 本期学习的字源：pre-=before前 Mainland China 单词不需要大写，单词与例句或不同词条之间换行即可。 注解中详细介绍了单词的拆分与释义，是学习字源分析的重中之重！一定记得听写后来看注解！
prevent preclude The approaching typhoon precludes any chance of a ball game tomorrow. prescience The investor demonstrated remarkable prescience by selling his stocks before the market crashed. presentiment The man had a presentiment that something might go wrong, so he chose not to board the plane. unprecedented The president's proposal to visit Mainland China was unprecedented.
The approaching typhoon precludes any chance of a ball game tomorrow. 台风临近，所以明天不可能举行球赛了。 The investor demonstrated remarkable prescience by selling his stocks before the market crashed. 这位投资人在股市崩盘前把股票脱手，展现了未仆先知的本领。 The man had a presentiment that something might go wrong, so he chose not to board the plane. 这个人有预感会出事，所以决定不上飞机了。 The president's proposal to visit Mainland China was unprecedented. 总统提议访问中国大陆，这是前所未有的。