我非常冷静.美国的俗语里有这么一个说法：to be cool as a cucumber.Cucumber就是黄瓜.To be cool as a cucumber从字面上来解释就是：像黄瓜一样凉爽.但是,要从俗语的角度来解释,它的意思就不同了.To be cool as a c...