穆兰勉强一笑，露出下颚的牙齿，发出善意的轻笑。接着她又回到现有的话题上。
Mulan gave me a pathetic lower-teeth-revealing smile and grunted a charity chuckle. Then she got back to the topic at hand.
下颚的这颗牙齿对冷热很敏感。
一条穿过马下颚的绳子或皮带，与马衔铁连接用来控制马。
A chain or strap that passes under a horse's lower jaw and serves in conjunction with the bit to restrain the horse.
研究者们相信这种下颚的结构和特征与鸟类和非鸟类恐龙均具有联系。
The structure and characteristics of the jaw are associated with birds and not non-avi
在语音教学的教师可在左下颚的拇指和其他四个手指，上颌。
In pronunciation teaching, teachers can make the thumb of left hand as lower jaw and the other four fingers as upper jaw.
科研人员给上颚的左犬齿（比较尖的那颗）或者是下颚的左犬齿注射一个短的电脉冲。
The researchers delivered short electrical pulses to either the upper left canine tooth (the pointy one) or the lower left canine tooth in the subjects.
多数牙上有两道沟槽，以便引出下颚的毒腺的分泌物，内含神经毒素，但很少能致人死亡。
The venom (a neurotoxin) is conducted along grooves in the teeth from glands in the lower jaw. Bites are rarely fatal to humans.
问题：位于中央位置的门牙是非常容易受到腐蚀的，而下颚的门牙则直接则特别容易遭受磨损。
PROBLEMS: The central incisors are most vulnerable, but those in the lower jaw are particularly affected by teeth grinding, which 8 per cent of us do unconsciously.
不幸的是，上颚的第四颗前臼齿很大，看起来就象是下颚的第一颗臼齿，这颗前臼齿也被称作叫裂齿。
Unfortunately, the fourth premolar in the upper jaw is quite large and looks like the first molar in the lower jaw; it is known as a carnassial tooth.
在脓胞肿瘤出现大量的蛆寄生后，袋獾的面部会严重畸形，使下颚的牙齿突出、无法咬合，染病的袋獾会先把致命肿瘤传染给其他个体，最后才挨饿而死。
Pustulant tumors that become infested with maggots deform their faces, forcing teeth from their jaws. The devils eventually starve, but not before passing on the virulent cancer.
猫鼬强有力的下颚能够一下子杀死一条蛇。
The mongoose's powerful jaws can dispatch a snake in one blow.
刹那间，鲨鱼用它有力的下颚抓住了一条大鱼。
In a flash the shark caught its victim, a large fish, in its powerful jaws.
刹那间，鲨鱼用它有力的下颚咬住了一条大鱼。
In a flash, the shark caught its victim, a large fish, in its powerful jaws.
它的头骨与鲸类相似，但它的下颚骨没有现代鲸鱼用来接收水下声音的、充满脂肪或油脂的扩充空间。
The skull is cetacean-like but its jawbones lack the enlarged space that is filled with fat or oil and used for receiving underwater sound in modern whales.
事实证明，海豚的下颚主要负责捕捉返回的声波并将它传输到内耳。
It turns out that the jaw is primarily responsible for capturing and transferring returning sound waves to the dolphin's inner ear.
那位拳击手看准了机会，猛击对手的下颚。
The boxer saw his chance and struck out at his opponent's jaw.
埋葬虫拍击它们父母的下颚。
放松你的下颚让你的嘴巴打开。
坚利的牙齿和下颚说明这只霸王龙肯定是个可怕的猎手。
With its powerful jaws and teeth, T-Rex was a terrifying predator.
研究者们在对科莫多龙进行核磁共振成像时发现，在它的下颚处长有复杂的毒腺。
When the researchers performed an MRI of a dragon, they found in its jaws what they called the most structurally complex reptile venom gland known.
一块带有三只臼齿的下颚骨在犹他州韦恩郡的千湖山1万英尺高处被发现。
A jawbone with three molars was found 10, 000 feet up Thousand Lake Mountain in Wayne County, Utah.
一块带有三只臼齿的下颚骨在犹他州韦恩郡的千湖山1万英尺高处被发现。
A jawbone with three molars was found 10,000 feet up Thousand Lake Mountain in Wayne County, Utah.
请注意下颚骨是如何联锁而形成坚墙的。
Notice how the original jawbones interlock to form sturdy walls.
猫鼬快速的反应可以帮助他躲避眼镜蛇的防御性攻击，它有力的下颚能够一下子杀死一条蛇。
The mongoose’s quick reflexes help it dodge the cobra’s defensive bite, and its powerful jaws can dispatch a snake in one blow.
经过艺术家重塑的这张脸，可能属于一名男性也可能是女性，是以发现于一个熊冬眠洞穴里的部分头骨和下颚骨为基础建立的。
The artist's reconstruction - a face that could be male or female - is based on the partial skull and jawbone found in a cave where bears were known to hibernate.
我知道一个家族每次家庭成员们见面都小心翼翼的握手问候对方，没有亲吻，只用下颚快速的碰一下，好似用来接触对方的不是嘴唇而是耳朵。
I know clans whose members greet each other with gingerly handshakes or, in what pass for kisses, with hurried brushes of side jawbones, as if the object were to touch not the lips but the ears.
我知道一个家族每次家庭成员们见面都小心翼翼的握手问候对方，没有亲吻，只用下颚快速的碰一下，好似用来接触对方的不是嘴唇而是耳朵。
I know clans whose members greet each other with gingerly handshakes or, in what pass for kisses, with hurried brushes of side jawbones, as if the object were to touch not the lips but the ears.
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