Pattinsonization
粗铅除银精炼法
🗣️ 情景例句
Could you tell me what's in this?
您能告诉我这里面是什么吗？
We know that you are leading exporters of coal and you can provide the quantity we need.
我们知道贵方是主要煤炭出口商，能满足我们的需求量。
When is the most convenient time for you?
你什么时候最方便？