6. The shark snapped its jaws shut.　

鲨鱼啪嗒一声把嘴合上了.

5. To work the jaws and teeth vigorously.　

用力地活动嘴和牙齿

4. He yawned his jaws out of joint.　

他打呵欠打得下巴关节脱了臼。

3. Project one's jaw in defiance.　

伸出下颌以示轻蔑

2. Some ants have extra powerful jaws. 　

有些蚂蚁的上下颚特别强而有力。

1. He has some sore swellings on his gum or jaw.　

他的牙床和下巴肿痛。

4. upper jaw　

上颌，上颚

参考例句

3. lumpy jaw　

放线菌病

2. lower jaw　

下颌

1. lantern jaw　

n.突出的下巴