Toddite
铌钽铁铀矿
🗣️ 情景例句
I felt the same way.
我当时也有这种感受。
I'm single.
我现在单身。
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