Sturtite
水硅铁锰矿
🗣️ 情景例句
After you.
请先走。
I have no secret of success but hard work.
成功无秘诀，只是努力干。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子