Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal.

曾经主要由青少年购买的口香糖，现在在广告中被用作饭后的口气清新剂和牙齿清洁剂。

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Baring the teeth in a hostile way, as noted by Charles Darwin in the nineteenth century, may be a universal sign of anger.

正如查尔斯达尔文在19世纪指出的那样，怀有敌意地露出牙齿可能是人们表现愤怒情绪的通用表情。

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In the morning, I brush my teeth as usual.

早晨，我像往常一样刷牙。

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As he once told the Washington Post: "When I came down I hurt my teeth in the net."

VOA: special.2010.07.05

I move out of the room toward the bathroom, planning to brush my teeth. As I enter the bathroom, it's much more light, I look in the mirror and-- here's where things get really weird--I don't see anything.

我离开卧室走向浴室,要去刷牙,当我走进浴室时,光线明亮了些,我看着镜子,从这里情节就诡异了,我什么也没看到

耶鲁公开课 - 死亡课程节选

According to two researchers at the University of Kansas, the heart rates of people tested recovering from stress were 7% slower, if they gripped a pair of chopsticks in their teeth in such a way as to force themselves to smile.

FORBES: New Data on Smiling

Although no drill has been found, archaeologists have discovered beads of the same 2.5mm diameter as the holes found in the teeth, indicating the people did have the capacity to do delicate work.

BBC: Prehistoric dentistry evidence found

She cut her teeth in politics as a student involved in Latin America's labor politics.

FORBES: Dilma Rousseff