Remember the gaps between the teeth?

记得牙齿间的缝隙吧？

youdao

He is removing bits of food stuck between the teeth with a toothpick.

他正用一根牙签剔除牙齿间的饭渣。

youdao

The timing between pulses determines the spacing between the teeth of the frequency comb.

脉冲的定时间隔决定了频率梳的齿间距。

youdao

And between the teeth was a piece of the animal's ear.

VOA: special.2009.10.31

Professor Paul Bloom: I don't know if that's--The question is, "Is there a difference between smiling with your teeth versus just your lips closed?"

我不知道是否，问题是，微笑露齿与不露齿有不同吗“

耶鲁公开课 - 心理学导论课程节选

You cannot get in between the teeth well with anything other than floss.

WSJ: How to Be a Better Flosser

Time magazine would feature the president as a black FDR replete with fedora and a cigarette holder clenched between the teeth of that amazingly confident smile.

CNN: 1 year in: Will fortune smile on Obama?

So while mouth washes are great for killing remnant bacteria on all surfaces, you have to get between the teeth with the ancient invention called floss to really reach every spot.

WSJ: How to Be a Better Flosser