Fersmanite
硅钛钙石
🗣️ 情景例句
I owe you a good steak dinner.
我欠你一顿牛排晚餐。
Nothing is given so freely as advice.
劝人最容易。
To get a full appreciation of what this means we must turn first to some recent human inventions.
要透彻理解这句话的意义，我们应先回顾一下人类最近的几项发明。