求翻译：从图5 (a)中可以看出，纤维的加入阻止了裂缝的进一步发展，部分纤维被折断，但是纤维另一侧水泥石仍然完好，这充分说明了纤维起到了增韧阻裂的作用。是什么意思？

It can be seen from Figure 5 (a), the addition of fiber to prevent the further development of cracks, and some of the fibers are broken, but the fiber other side of the cement stone is still intact, which fully shows that the fibers play the role of toughening crack resistance.

From Figure 5 (A) can be seen in the fibers of the cracks to prevent the further development, some fibers are broken off, but on the opposite side fiber cement stone is still good, this is clear evidence that the fiber has been toughened up the crack.

In (a) may see from Figure 5, the textile fiber joined has prevented the crack further development, the partial textile fibers are broken off, but the textile fiber another one side limestone was still complete, this explained the textile fiber fully the plasticizing anti- crack function.

Figure 5 (a) can be seen in the fiber joining prevented further development of cracks, some of the fiber is broken, but fiber cement is still intact on the other side, which fully describes the role of fiber has been toughened by crack.

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