一定要使你的舌头接触下齿的背面。

Make sure that your tongue touches the back of the lower teeth.

youdao

齿及此事，我不得不重申一下我的观点。

Referring to this affair, I have to reiterate my opinion.

youdao

在此情况下，齿数为输入的参数。

In this case, the number of teeth is an input parameter.

youdao

研究了不同高度的棘齿势下的粒子的定向运动。

The transport in different ratchets has been studied.

youdao

公司有自主研发材料的能力，开发出符合不同工矿条件下的斗齿。

We are also capable of inventing materials for different work and digging conditions.

youdao

从外径最外侧到齿根下15毫米，即齿区。

OD to 15 mm below tooth root, ie tooth zone.

youdao

从外径最外侧到齿根下15毫米，即齿区。

OD to 15 mm below tooth root, ie tooth zone.

youdao