Photosedimentometer
光透式粒度测定仪
🗣️ 情景例句
Well, what's going on?
噢， 怎么啦？
May I see your Identification card?
我能看你的身份证吗？
Have you just made a new film, Miss Marsh?
您刚拍完一部新电影吗，马什小姐？