Ferrazite
钡铅磷矿
🗣️ 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英语，她教我弹钢琴。
Has anybody else anything to say on this?
关于这点，谁还有什么别的要说吗？
'Whatever are you doing up here Bill?' asked the vicar in surprise.
“你究竟在这上面干什么，比尔？”牧师惊讶地问。