He has got to hear it from the horse's mouth. Then he can make a judgment as to whether his policy is correct or not.

他必须获得可靠消息。然后他就能判断出他的政策是否正确。

An orthodontist took a cast of the inside of Billy's mouth to make a dental plate.

正牙医师从比利的口腔内部取了模型来制作齿板。

A big no-no at formal dinner is talking while eating. Make sure that you finish the food in your mouth before communicating with others.

在正式的餐会上的一大禁忌就是边吃边说，你在和别人交谈之间一定要先把嘴里的食物咽下去。

The fish rests on the ocean floor as he prepares to make a dart for any passing prey he has lured towards him using the protrusion above his mouth.

这条鱼在海底静静地等待被他嘴巴上面的突起物应有过来的猎物，随时准备对游过的美餐发动突袭。

To make the /i/ sound, raise the middle of your tongue high in your mouth and tense your muscles into a smile. Make a voiced sound.

发/i/的音时，抬起舌头的中间部分，让口腔肌肉变得紧张，做出微笑的样子，然后发声。