沿着纤维长度有很强结合力的共价结合在这个方向上给予复合材料很高的模量，因为要损坏或拉伸纤维就必须破坏或移除这种结合。
The strong covalent bonds along the fiber's length give them a very high modulus in this direction because to break or extend the fiber the bonds must also be broken or moved.
运行时间的不同，意味着纤维，进而是结构部件受到了拉伸或挤压。
Differences in travel time mean the fiber, and thus the structural element, is being stretched or compressed.
他们声称通过伸展，肌肉纤维会被拉伸，原有的平衡被打破，使得它们来不及应对接下来紧张的锻炼。
They claim that by stretching, muscle fibers are lengthened and destabilized, making them less prepared for the strain of exercise.
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