Mesendoderm
[医] 中内胚层
🗣️ 情景例句
We have a new artist.
我们找来了一位新的美工人员。
It's a once in a lifetime chance.
这是一生难得的机会。
but it is of a kind that, if he meets it, he can readily understand and deal with.
但如果有这种情况，露营者也容易理解，知道如何对付，