Paleotopography
古地形
🗣️ 情景例句
When you have nothing to do, time goes slowly.
你没事做时，时间便过得很慢。
In college I majored in history, What was you major?
大学时我主修历史，你主修什么呢？
Are we going there by bus?
我们要乘公共汽车去吗？