Photosedimentometer
光透式粒度测定仪
🗣️ 情景例句
I think you, rather than Jim, are to blame.
我认为该受责备的是你，而不是吉姆。
So far I have been learning about China.
到止前我止，我一直都在研究中国的事情。
Use your head.
动动脑筋。