Ectomesenchyme
外胚层间(充)质
🗣️ 情景例句
OK. Let's talk.
好， 我们谈谈吧。
The story Sam told wasn't very funny.
萨姆的故事一点意思也沒有。
You can join the line behind the clock tower.
你可以到钟楼后面排队。