因此,他们的第一个日历系统被自然地分为三个季节,每个季节都是根据河流的变化而划分:淹没期、下沉期和丰水期。
So, naturally, their first calendar was divided up into three seasons, each based on the river's changes: inundation, subsidence and harvest.
丰水期水质比较稳定,枯水期水质变化相对比较大。
The water quality was more stable in high flow period and more changeable in low flow.
丰水期水质比较稳定,枯水期水质变化相对比较大。
The water quality was more stable in high flow period and more changeable in low flow.
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