Ecostratigraphy
生态地层学
🗣️ 情景例句
We've got a lot to talk about.
我们有很多可商量的了。
He's been out of a job for months.
他已经失业好几个月了。
Will you please sweep the floor and tidy the classroom every day?
请你们每天都打扫地板、整理教室，好吗？