跟“黄瓜”学俚语：镇定自若(组图)

　　cucumber(黄瓜，胡瓜)

　　cool as a cucumber (to be):to be calm and composed 十分冷静，镇定自如

　　eg.Although he's guilty of the crime ,he sure as cool as a cucumber.尽管他犯了罪，却还是那么镇定自如。