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!keep one's cool和keep cool在词义上有一样的,也有不同。
keep one's cool中cool为名词,中文意思是保持冷静
keep cool中cool为形容词,中文意思是保持冷静保持凉爽镇定自若
In ancient China, hand fans were almost the only ones to help people keep cool.
在古代中国,手扇几乎是唯一的帮助人们保持凉爽的工具。
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