Tricalcium
三钙
🗣️ 情景例句
Well, we do too, Ellen.
嗯， 我们也需要，Ellen。
If you attend the wedding, what would you wear?
如果你参加婚礼，你会穿什么衣服？
How long did it take you to accomplish this complicated job?
你花了多久才作完这复杂的活儿？