The receding of the jaw and the increasing size of the brain in human evolution has made the face essentially vertical, with two distinctively human features: a prominent, projecting nose and a clearly defined chin.

在人类演化过程中,脑容量增加,颚齿部的后缩,脸部侧面基本上是垂直的,具备两个明显的特征,即鼻显著突出和颏界线分明。

属类：化学及生命科学-医学-生理与解剖

Standing behind the animal, grasp the lower jaw , pull the head back slightly, and cut across the throat from ear to ear as deeply as possible.

站在牛后面,抓住其下颌,稍向后拉牛的头,然后从左耳到右耳尽可能深地切开其喉咙。

属类：工程技术-食品工程-

To hit a man square on the jaw

照直打一个人的下巴

属类：综合句库--

A left hook to the jaw

照着下颌的一击左钩拳.

属类：综合句库-典型例句-

The boxer hit his opponent with a hard right to the jaw

这个拳击手用有力的右手击中了对手的下颚。

属类：综合句库--

The tooth was drawn from the upper jaw

这颗牙由上颚拔出。

属类：综合句库--

There is no long,slender mandible of a lower jaw in the whale.

这种鲸鱼没有细长的颔下颚骨。

属类：综合句库--

A chronic disease of adults marked by enlargement of the bones of the extremities,face,and jaw that is caused by overactivity of the pituitary gland.

肢端肥大症由于脑下垂体过于活跃而在成年人中引起的一种慢性疾病,常表现为四肢骨骼、脸和下巴的增大

属类：综合句库--

Hold your jaw !

住嘴!少废话!

属类：综合句库--

The voices were subdued and sporadic at first, but they became louder and louder as more girls took up the cry, Tu Wei-yueh cast a furtive glance at Pockmarked Li and saw that his face was dark and his jaw set firm

最初不很响,也不很多;后来却一点一点多起来了,也响起来了。屠维岳偷偷地看了李麻子一眼,李麻子铁青着脸,咬紧了牙齿。

属类：综合句库--