Perovskite
钙钛矿
🗣️ 情景例句
He gives his harness bells a shake
摇动， 绳上的铃铛
I can hardly wait to see the new comet.
我急不可待地要见到新彗星的出现。
I'm sorry, these 2 books are 3 days overdue.
小姐，对不起，这两本书已经过期3天了。