irregular fracture

• 不规则断口

irregular fracture的用法和样例：

例句

1. It is brittle and breaks with a conchoidal fracture surface.
   性脆，具贝壳状断口。
2. The tesile fracture is mixture of quasicleavage and touph dimple.
   拉伸断口为韧窝和准解理混合断裂。