Chalcomenite
蓝硒铜矿
🗣️ 情景例句
I've got three days off next week.
下星期我有三天假。
Please keep the cartons to 15kg each and metal-strap all cartons in stacks of 4.
请将每个纸箱重量限制在15公斤内，并将每4箱一组用铁条儿固定起来。
Fine, thanks, Dad. What about you?
很好，谢谢爸爸。你呢？