求翻译：如果我们像一个细胞那么小，能够随意进入人的身体，那么当我们来到肌肉群中时，就会发现肌肉是由一道道钢缆一样的肌纤维捆扎起来的。这些钢缆组合成较粗较长的缆绳群组，当肌肉用力时，它们就像弹簧一样一张一缩。在那些最粗的缆索之内，有肌纤维、神经、血管，以及结缔组织。每根肌纤维是由较小的肌原纤维组成的。每根肌原纤维，则由缠在一起的两种丝状蛋白质(肌凝蛋白和肌动蛋白)组成。这就是肌肉的最基本单位，那些大力士们的大块大块的肌肉，全是由这两种小得根本无法想像的蛋白组合成的，当它们联合起来以后，就能做出惊天动地的动作来。人就是靠这些肌肉一点一点地改变了地球的面貌。是什么意思？

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If we are like a small cell to be able to enter the body when we came to muscle groups, you will find that your muscles is an escape from a steel cable as the fiber bundle. These steel cable into a thick long rope group, when the muscles firmly, they are like a spring one. In those who are most in t

If we look like a cell to be so young, can enter human's body at will, when then we arrive in the muscle group, can discover the muscle is ties up by a road steel cable same muscle fiber.These steel cable combine Cheng Jiaocu the long cable group group, when the muscle makes an effort, as soon as th

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