Blastulation
囊胚形成
🗣️ 情景例句
Can you help me?
你能帮帮我吗？
Who am I supposed to see?
我应该去见谁？
From time to time, I notice that he puts a piece of meat down his trousers just before he leaves the factory.
我经常看到，他在快要离厂前把一块肉藏在裤子里。