Flotator
浮选机
🗣️ 情景例句
Me?
我吗？
A man without a smiling face must not open a shop.
人无笑脸，不要开店。
and then there are three thousand million other Milky Ways, or galaxies, in the universe.
况且在宇宙中还有30亿个天河，即银河系。