Photosedimentometer
光透式粒度测定仪
🗣️ 情景例句
Something that might be surprising to you.
一件也许会让你吃惊的事。
I asked him if he spoke English.
我问他他是否说英语。
The dealer told him that it had just come in, but that he could not be bothered to open it.
古董商告诉他那只货箱刚到不久，但他嫌麻烦不想把它打开。