Bohollsland
Why were the ancient civilizations cultivated mostly from the big river basins? 文化的产生用cultivate （孕育，培育）较好。
请别叫我龙爷
这句中"发生"是最简单但最容易表达错的,往往望文生义译成 takeplace occur "发生:意味着"产生"和"繁荣"两个含义 一个"come into being" 一个"flourish" ,而且,还强调 "在大河流域"因此: Why was it in the river basins that the ancient civilizations came into being and flourished?
