Cataloid
胶体二氧化硅
🗣️ 情景例句
Please have these clothes washed before eight o'clock tonight.
我今晚8点前请把这些衣服给洗了。
From saving comes having.
富有来自节约。
The students followed Uncle Wang to see the other machine.
学生们跟着王大叔去看另一部机器。