晶体发生学（crystallogeny）又称晶体生成学。结晶学的一个分支。研究晶体的发生、成长、变化等方面的现象、机理和规律。它对指导人工制备晶体以及解释晶体的某些现象、特性和成岩、成矿作用的一系列问题等方面均具有重要意义。
背景：研究发现晶体上皮细胞的凋亡是白内障发生的共同细胞学基础。
BACKGROUND: it was reported that the apoptosis of lens epithelia was the common cytological basis of the genesis of cataract.
简述黄铜在雨季发生裂纹，锌发生晶体孪脱时，出现“哭声”等金属学现象。
And the phenomena was also introduced briefly that brass cracks, and when zinc crystal is peeled off twice, zinc sounds like a cry at the rain season.
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