Elkonite
埃尔科奈特钨铜烧结合金
🗣️ 情景例句
Yes. And I'm not trying to take her place.
是的 ，我不想取代她。
I know the boy whose father is a guide.
我知道那个男孩的父亲是导游。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，