Rittingerite
砷硒银矿
🗣️ 情景例句
It's one of the best schools in the country, Robbie.
这是全国最好的大学之一， Robbie。
I played upstairs yesterday.
我昨天在楼上玩。
She can't come. She has to help her Mommy!
她不能来。她得帮她妈妈的忙！