Calcium orthodisilicate
[机] 原二硅酸钙
🧩 词语组成解析
🗣️ 情景例句
We have to advance the building of the new school.
我们必须促进新学校的建设。
You shouldn't refuse the children's request.
拒绝孩子们的恳求是件不好的事。
No, they aren't. They're on the floor.
不，不在。它们在地上。