Ectoblast
n. 外胚层\\n[医] 外胚层, 外膜
🗣️ 情景例句
Now he's got his own trading company. Ann told me he made four million dollars last year.
现在他已有自己的贸易公司。安告诉我他去年赚了400万美元。
My brother wants to learn how to fly a plane.
我的兄弟要去学开飞机。
Dear Joan,
亲爱的琼，