Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
Richard! I haven't brushed my hair. Richard
我头发都没有梳。
The master always exacts quality work from his students.
老师常常要求学生们认真踏实的完成功课。
We must call the doctor.
我们得去请医生。