2007.09.25 : You've just said a mouthful!
你说到点子上了！
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名词mouthful的本意是吃一口菜、吃一口饭的“一口”（The amount of food or other material that can be placed or held in the mouth at one time），而say a mouthful是一个美国俚语，意思是，说得中肯，说到点子上。这句中，mouthful的含义就变为“重要而有洞察力的见解”（An important or perceptive remark）。
例句：
Senator, I want to tell you that you sure said a mouthful when you said taxes are too high and you'd work hard to lower them. Good to hear, and you can certainly count on my vote!
参议员，你说税收太高，你要努力想办法来降低税收。我要告诉你，你说的完全正确。听到这样的话很高兴，我一定会投你一票的。（一个人在赞扬一位竞选连任的参议员所发表的讲话）
海纳百川，有容乃大；壁立千仞，无欲则刚。