Medullation
髓形成, 髓鞘形成
🗣️ 情景例句
It's almost ten o'clock.
差不多十点了。
It's a beautiful country with many large rivers.
这个国家很美，它有很多大河。
Just a minute, please. I'm sorry, he's not here right now. Can I ask who's calling?
请稍等。对不起，他现在不在这儿。请问你是哪位？