Naumannite
硒银矿
🗣️ 情景例句
I'm heading off for bed
我先去睡觉了
No, Jack. You must go on.
不行，杰克。你必须继续下去。
Though he was technically a prizefighter, Mendoza did much to change crude prizefighting into a sport,
虽然门多萨严格来讲不过是个职业拳击手，但在把这种粗野的拳击变成一种体育运动方面，他作出了重大贡献。