Calcium dithiocarbonate
[医] 二硫代碳酸钙
🧩 词语组成解析
🗣️ 情景例句
May I ask who's calling?
请问你是谁？
Don't forget to invite him.
不要忘记邀请他。
Our school is in the east of Beijing.
我们学校在北京的东部。