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.
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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