Tapalpite
铋银矿
🗣️ 情景例句
Susan, will you marry me?
Susan，你愿意嫁给我吗？
Let's stop discussing trivial details and come to the point.
咱们别再谈琐碎细节了，说正事吧。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。