Plattnerite
块黑铅矿
🗣️ 情景例句
Do I have to get it done by noon?
我必须在中午以前做完吗？
What's the price of that electric iron?
那个电熨斗的价格是多少？
Yes, of course. It's very easy.
那当然。煮它（豆腐）并不难。