Plumbonacrite
水白铅矿
🗣️ 情景例句
We've only been here for a day,
我们到这里仅仅一天，
I want to apologize.Is there anything I can do?
我要道歉。我能想点什么办法吗？
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，