Prefloat
预浮选
🗣️ 情景例句
Is everything OK?
一切都好吗？
I didn't read the whole paper, front page.
我没有看到报纸的全部，我只是大概看了头版。
When the instrument is situated at more than 700 miles from the earthquake centre,
如果把这种仪器安装在距震源700多英里远的地方，