Blastulation
囊胚形成
🗣️ 情景例句
Would you like something to eat?
来吃点东西， 好吗？
Perhaps I can sneak out of the classroom unnoticed.
也许我可以神不知鬼不觉地溜进教室。
I'm thinking of buying some next Sunday.
我打算下星期天去买几条。