Petrometallogeny
岩石成矿作用
🗣️ 情景例句
This will make a nice gift for Marilyn and Richard.
这是给Richard和Marilyn的一件好礼物。
You're big and fat, and I'm little and skinny.
你虽然大而胖，但我却小而瘦。
when the plane suddenly turned round and flew back to the airport.
这时飞机突然调转头来，飞回了机场。