Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
He says I never turn them out when I leave.
他说我离开时从不关灯。
Where is the boarding gate for this flight?
这班飞机的登机门在哪儿？
Yes. You should never keep fish in a small round bowl.
错不了。你绝不能把鱼养在一个小圆缸里。