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.
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.
埋葬虫拍击它们父母的下颚。
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.
三角脸的下颚突出，比颧骨更宽。
A triangular face has a prominent jaw that is wider than the cheekbones.
人类的牙齿及下颚由于烹饪的发明而变得越来越小。
Human molars and jaws responded to the invention of cooking by getting smaller.
别格的牙关咬得那么紧，连上下颚都疼了。
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.
不要把餐巾塞入马甲或围在下颚像婴儿的围兜。
Don't tuck the napkin in your vest or put it under chin like a baby's bib.
上颚突出式咬和或下颚突出式咬和属于严重缺陷。
A bite which is undershot or overshot should be severely penalized.
我们必须提起下颚以便清理出肺部吸入空气的通道。
We must lift the person's chin so that we clear a pathway for air to get into the lungs.
这些蚂蚁通过互相抓住彼此的下颚和侧爪，聚集在一起。
The ants connect by gripping each others’ mandibles and claws.
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.
拥有一个以上的下颚，尤其是特殊种类的。常用于复合词。
Having a jaw or jaws, especially of a specified kind. Often used in combination.
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.
粗壮、厚实的下颚适合于挤压蜗牛，而长形下颚最适合吸食藻类。
Robust, thick jaws are excellent at crushing snails, while longer jaws work well for sucking up algae.
它们的下颚有力，牙齿锐利，占其体长一半的尖尾能够充当鞭子驱散捕食者。
They have strong jaws with razor-sharp teeth and sharp tails, which make up half their body length and can be used as whips to drive off predators.
这种3英尺长的鳄鱼以植物和幼虫为食，它下颚上长着一对龅牙用来挖掘食物。
This 3-foot-long croc was a plant - and grub-eater with a pair of buckteeth in the lower jaw it used to dig for food.
不过，他们找到的第二个下颚，据说形态与大小都与LB 1一样。
But they did unearth a second lower jaw that they say is identical in size and shape to LB1 's.
用猛犸骨头、下颚骨和头骨建造房屋，在旧石器时代的猛犸狩猎文化中很普遍。
The use of mammoth bones, jaws, and skulls to build structures was common among the mammoth-hunting cultures of the Upper paleolithic.
我们学习时，脸部和下颚会绷紧，这套动作能帮你放松这两个部位。
Do this while you're studying to help loosen up your face and jaw, which can get really tense while you're studying.
不过这种镜架不适合方脸，因为它们会让佩戴者的下颚看起来更宽大。
These frames don't go well with square faces, since they might exaggerate the wearer's strong jawbones.
我们已经从运动医学中学到这套方式：深呼吸，肩膀放松，收紧下颚。
We have learned this structure from sports medicine: deep breathing, shoulders down, chin up!
在棚屋底部，猛犸下颚骨交叉连结——这一巧妙设计在多数猛犸狩猎遗址都能看到。
The mammoth jaws used at the base were interlocked -- a clever technique found at most of the mammoth hunter sites.
在棚屋底部，猛犸下颚骨交叉连结——这一巧妙设计在多数猛犸狩猎遗址都能看到。
The mammoth jaws used at the base were interlocked -- a clever technique found at most of the mammoth hunter sites.
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