纤维可以使混凝土弯曲并出现头发丝细的裂纹，而不是直接裂出口子。
The fibers allow the concrete to bend and crack in narrow hair-width fractures rather than gaping splits.
通过前次X光照射证实，那个头发丝大小的骨裂，非但没痊愈，而且已经扩大到整个骨头……
"The hairline fracture that is present in the previous X-rays showsevidence it has not healed and has extended across the bone, " Clantonsaid.
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