Stratigraphic
a. 地层学的
🗣️ 情景例句
I have just begun to learn and my serve isn't very good.
我刚刚开始学习，发球不太好。
Are you Peter Smith?
你是彼得·史密斯吗？
I'll call a taxi in case of need.
如果需要的话，我会叫出租车的。