Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
You must observe these simple rules.
你必须遵守这些简单的规定。
I'm going to tell him how to get it.
我正要告诉他如何得到它。
It happens every night. The noise wakes me up. Would you please not do this?
每晚都这样。这声音总吵醒我！请你别这样，好吗？