Scherbakovite
硅铌钡钠石
🗣️ 情景例句
Where shall I put my signature?
我签在哪儿呀？
Take a rain check
遇雨改期
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上，当车突然开动时，他为什么会倾倒呢？