Soft pitch is a black solid at a certain temperature , it will be solidified into a brittle solid with shell-like fracture.
常温下为黑色固体，在一定的温度下凝固成很脆的具有贝壳状断口的固体，呈玻璃相；
2
The present paper explores new and more profound approaches, namely microscopic and nanoscopic fracture mechanics, to unlock the black box of fracture process zones.
本文探索打开断裂过程区的黑匣子之更深层次的研究——即细观断裂力学与纳观断裂力学。
3
Objective In order to observe the curative effects that black jade dipsacus cream cure bone fracture.