Polyarsenite
红砷锰矿
🗣️ 情景例句
I visited Japan on an observation tour of its industries.
我到日本观摩它的工业。
He is a manager of a famous corporation.
他是一家着名公司的经理。
'I've just arrived by train,' she said.'I'm coming to see you.
“我刚下火车，”她说，“我这就来看你。