发现的人类脚部骨骼化石很少。
脚部骨骼和肌肉结实，腿也相应较长。
跑步能增强你的心脏和肌肉功能，但反过来也可能损伤你的膝盖和脚部骨骼。
Running can strengthen your heart and muscles, but conversely, it can also damage your knees and the bones in your feet.
枕头的凹部的弧形凹陷可以起到对孩子的头部骨骼定型的作用，有效预防枕秃的现象；
The arc-shaped concave of the sunken part of the pillow, can effectively solidify the bone growth, and prevent the part of head resting on the pillow getting bald;
周四出版的科学杂志上的一个研究声称：从一段在埃塞俄比亚发现的足弓部化石骨骼上研究显示，人类祖先在320万年以前已不再生活在树上而是开始在地上直立行走。
An arched fossilized foot bone found in Ethiopia shows that human ancestors walked upright 3.2 million years ago and were no longer tree dwellers, said a study Thursday in the journal Science.
根据退伍军人事务部的统计，在伊拉克和阿富汗的战争中的患肌肉骨骼病症的退役老兵的人数，从2003年至2009年增加了十倍。
According to the Department of veterans Affairs, veterans of the wars in Iraq and Afghanistan who retired with musculoskeletal conditions grew tenfold between 2003 and 2009.
但是对一部分人来说，他们的骨密度会很快得降低，导致骨骼变得疏松，增加了骨折的风险性。
But for some, the decline in density is rapid, as their bones become porous and fracture risk increases.
因为处在身体的末端，脚部是食腐动物最先吃掉的身体部位，又因为脚部是由很多小骨骼和软组织构成，它们很容易被毁掉。
Being at the extremities of the body, feet are often the first parts of a body that scavengers will chew on, and being made up of lots of small bones and soft tissue they are easily destroyed.
原肠胚形成过程中，由上胚层细胞增殖产生的一部分细胞在上、下胚层之间形成的第三层细胞。通常形成骨骼、肌肉、结缔组织、心脏、造血系统、肾脏和其它器官。
Mesoderm --- The middle germ layer in the early embryo; the source of cells that go on to make bones, muscles, connective tissue, heart, hematopoietic system, kidney, and other organs.
然而，昆虫其实有六条腿，身体分为三部分，还有外骨骼，即长在身体外面的骨骼。
But an insect actually has six legs, a three-part body, and an exoskeleton, which is a skeleton on the outside of its body.
运动系统由骨、骨连结和骨骼肌三部分组成。
The motor system is composed of the bone, the bone union and the skeletal muscle.
这些矫形假体可包括关节端部假体的元件以及更换居间骨骼缺损的部件。
These orthopaedic prosthetics may include elements of a joint endoprosthesis as well as components to replace intercalary bone loss.
它的形式在一个以上的一部分，积极骨髓的各种骨骼。
It forms in more than one part of the active bone marrow of various bones.
做为全身骨骼的一部分，颌骨的骨丢失一直被认为与全身骨质疏松存在关联性。
As a part of the whole skeleton, oral maxillofacial bone loss has some association with systemic osteoporosis.
黑人在踝部和足部有不同的骨骼结构。
Blacks have a different skeletal structure in the ankle and foot.
仍然有一小部分的人使用野生动物制品——毛皮、骨骼、血液、象牙。
Small Numbers of people worldwide use wildlife products - skins, bones, blood, ivory.
骨骼肌也可以使身体的一部分运动而另一部分继续地保持强直。
Skeletal muscles also can make one part of the body move while another part stays stiff.
第三部分是一个简单的动画记录初步折叠纸箱组成，利用为骨骼坐标合盈设置。
Part 3 a simple animation is recorded of the initial folding up of the carton, using HPB Settings in the coordinates for the bones.
影响错畸形型的骨骼因素主要包括上下颌矢状关系、垂直骨型、颏部倾斜度。
The main skeletal factors influencing malocclusion include the saggital and vertical skeletal relationship and the gradient of chin;
他们跟踪统计了在最近两部《哈利·波特》出版之后，因肌肉或骨骼受伤而到医院急诊室就诊的7至15岁孩子的数目。
They tracked the number of kids aged 7 to 15 who were treated for muscle or skeletal4 injuries in the hospital's emergency room after the latest Harry Potter books came out.
他们跟踪统计了在最近两部《哈利·波特》出版之后，因肌肉或骨骼受伤而到医院急诊室就诊的7至15岁孩子的数目。
They tracked the number of kids aged 7 to 15 who were treated for muscle or skeletal4 injuries in the hospital's emergency room after the latest Harry Potter books came out.
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