Cytokeratin
细胞角蛋白
🗣️ 情景例句
Which band of College English Test have you passed?
大学英语考试过了几级？
What can't be cured must be endured.
不治之症，必须坚忍。
He had been the first to turn a telescope to the sky,
他是第一个把望远镜对准天空的人，