When everything was ready, she took out a paper box for him as birthday present.
当一切准备就绪之后，她拿出一个纸盒送给他，是生日礼物。
The paper introduces the present situation, Charac-teristice, principle and typical process flow of SO_2 gassing hardening cold box process in our country.
文章介绍了我国目前SO_2吹气硬化冷芯盒制芯的现状、特点、原理及典型的工艺流程；
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。
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