Flotator
浮选机
🗣️ 情景例句
for giving me a passing grade.
给我及格分数。
A straw shows which way the wind blows.
一叶便知秋。
It is much cheaper to post or email a long report than to fax it.
邮寄或电子邮递一封长篇报告比传真要便宜得多。