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n. 嘴唇3 次
“Nature gave us lips to conceal our teeth,” ran one popular Victorian saying, alluding to the fact that before the birth of proper dentistry, mouths were often in a shocking state of hygiene.
维多利亚时代流行的一句俗语说：“大自然给了我们嘴唇来遮住牙齿。”这暗指在正规牙科诞生之前，人们口腔的卫生状况往往糟糕得惊人。
If you have a bone to pick with someone in your workplace, you may try to stay tight-lipped around them.
如果你对工作场所的某个人有意见，你可能会在他们身边尽量守口如瓶。
In an experiment published in 1988, social psychologist Fritz Strack of the University of Würzburg in Germany asked volunteers to [hold] a pen either with their teeth — thereby creating an artificial smile — or with their lips, which would produce a(n) [disappointed] expression.
在1988年发表的一项实验中，德国维尔茨堡大学的社会心理学家弗里茨·斯特拉克让志愿者要么用牙齿咬住一支笔——由此制造出一个假笑——要么用嘴唇含住笔，这会产生一种失望的表情。