息事寧人 Pour oil on troubled waters.
不可救藥 His deep-rooted bad habits are simply beyond remedy.
現身說法 warn people by taking oneself as an example.
文不對題 His composition is wide of the mark. ( beside the point )
虛心使人進步,驕傲使人落後 Modesty helps one go forward, whereas conceit makes one lag behind.
一時興起 Don't always do things by fits and snatches.
雅俗共賞 appeal to both refined and popular tastes.
糖衣炮彈 sugar-coated bullets
依賴某人 Hang on somebody’s sleeve.
急功近利 Eager for instant success and quick profits.