Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
But to tell the truth,
但是老实说，
If you have no questions, may I go on to the next stage?
如果你们没有问题了，我可以进行下一阶段吗？
Mrs.Richards sent her children to school and went upstairs to her bedroom.
把孩子送去上学，然后来到楼上自己的卧室。