发丝状裂缝的英文：
hairline fracture
极细的线,瞄准镜上的十字线
He was conscious of a hairline border never to be crossed
他意识到有一条永远不能逾越的小小的鸿沟。
Hairline stress fracture on my right distal radius.
重压使我的右桡骨末梢骨折。
Over time, ivory develops hairline cracks along its surface, between the mineralized prisms it is made of.
时间久了，象牙质的表面在矿化棱柱之间会产生发丝般细的裂纹。
Hairline: (1)Thinnest rule used by printers.(2)Very fine line or stroke in a letter.
细线:(1)印刷用的最幼线条。(2)印刷字体上的最幼线条或笔划。
Incipient shearing of main crop ore shows the development of hairline mylonitized shear zones that rapidly increase up to 2mm in width
主茬矿石的初始的错动是呈毛发状的糜棱岩化剪切带，然后很快地增大到2毫米宽。
n. 折断，破裂；骨折
v. 折断，破碎
Fracture measurements show that the mode attributed to cleavage fracture.
断口实验结果表明，接头断裂模式为解理断裂。
Fractures of the nose may be associated with septal fractures and hematomas
鼻骨骨折可伴有中隔骨折和血肿。
The bones fracture easily.
这些骨头易折断。
A serious misunderstanding fractured their friendship.
一场严重的误会破坏了他们的友谊。
fractured tie-bolt
断裂的贯穿螺栓