Schalfnerite
铜钒铅锌矿
🗣️ 情景例句
Hi, Son.
嗨 儿子。
How far is it from the shore of the Atlantic to the mountains?
从大西洋海岸到山脉有多远？
The nurse assisted the doctor in the operating room.
护士在手术室协助医生动手术。