Orohydrography
地形水文学, 山地水文学
🗣️ 情景例句
but now what?
但下一步怎么办？
Americans are hight mobile, and therefore may find it difficult to became deeply involued with other.
美国人的流动性，大，因此你会发现和他人深交很难。
Not that long ago!I'm not more than twenty-nine myself.
不，没有那么久。我自己现在还没29岁呢。