Eckermannite
[矿]氟镁钠闪石
🗣️ 情景例句
If you don't give me a better price, I won't buy this.
如果价格不更优惠些，我是不会买的。
My brother is a member of the faculty.He teaches economics.
我的兄弟是全体教员中的一员，他是教经济学的。
It must be the only modern house in the district.
它肯定是这个地区唯一的一栋现代化住宅。