Salufer
氟硅酸钠
🗣️ 情景例句
How much is a room per night?
一个房间每晚多少钱？
He tries to button his own shirt,but he can't do it.
他试着扣好他的自己的衬衫，但是他不能做到。
All these computer uses have become commonplace.
计算机的所有这些功能现在都变得很平常。