所以说虽然舌头仍然触及牙齿，它却是在向后移动。

So though it is still touching the teeth, it comes back like that.

youdao

通过传递正或负的增量就可以在堆栈中向前或向后移动。

By passing positive and negative increments, we will move forward and backward in the stack.

youdao

请你把车倒退一点，好让行人通过。ThebusWasbackingup。汽车正在向后移动。

Please back up your car a bit 'to let pedestrians pass.

youdao

请你把车倒退一点，好让行人通过。ThebusWasbackingup。汽车正在向后移动。

Please back up your car a bit 'to let pedestrians pass.

youdao