Dermatoblast
成皮细胞
🗣️ 情景例句
If my GPA isn't high enough I can't play any sports.
如果我的平均学分不够高，我就不能再参加体育活动了。
I didn't know whether to send the letter airmail or not.
我不知道是否送航空邮件。
But I'm worried about his Chinese.He may fall behind the other students when he comes back.
但我担心他的中文。等他回来后，他可能会落到其他同学后面。