Orohydrography
地形水文学, 山地水文学
🗣️ 情景例句
And down will come baby,
宝宝跌下来
I have to hang up now.
我现在不得不挂电话了。
We're going to leave at about seven thirty next Monday morning.
我们打算下星期一早上7：30 左右出发。