Conichalcite
砷钙铜矿
🗣️ 情景例句
No. But I have to.
没有 ，但有此必要。
We must make it clear from the very beginning that competitive quotations are acceptable.
必须一开始就讲清的是，有竞争力的报价可以接受。
I gave him a meal.He ate the food and drank the beer.
我给了他一顿饭。他把食物吃完，又喝了酒。