Mesendoderm
[医] 中内胚层
🗣️ 情景例句
Are there any tours for the Grand Canyon?
有到大峡谷的旅游团吗？
Excuse me, but could you give me some change?
劳驾，你能换些零钱给我吗？
We have an old musical instrument.
我家有件古乐器，