Your feet contain 52 bones, 66 joints, 40 muscles, and hundreds of sensory receptors, tendons, and ligaments- collectively forming two of the body's most beautifully efficient mechanisms.
这块骨头布满了正如你看到的穿透过头盖骨的光线还有空腔,鼻窦,使我们吸入的空气变的温暖和湿润。
And this bone is peppered, as you can see, with the light shining through the skull with cavities, the sinuses, which warm and moisten the air we breathe.
这是有道理的,”拉科瓦拉说,“因为所有四足动物都必须将身体的所有重量都放在这四块骨头上。
It makes sense,” Lacovara said,“since all quadrupeds have to put all of the weight of the body on just those four bones.
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