Photosedimentometer
光透式粒度测定仪
🗣️ 情景例句
Let's make it 6:00 at your place, is that OK?
咱们六点在你们家见，好吗？
How long is Jones Boulevard?
琼斯大街有多长？
She was a beauty in her day.
她年轻的时候是个美人儿。