Sefstromite
钒钛铁矿
🗣️ 情景例句
No, thanks.
不用了， 谢谢。
Are you going to Paris after you leave here?
离开这里以后，你打算去巴黎吗？
I argued that if I spent less time exhausting myself at exercises in the morning,
我辩解说，早晨少耗费精力锻炼，