Last summer, when Chinese people fought the flood in the South, Beidou helped measure the rise and fall of the flood water.
去年夏天，当中国人民在南方抗洪时，北斗帮助测量了洪水的涨落。
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And, sure enough, every week brings a flood of complaints in the media about the rich getting richer while the incomes of the middle class stagnate or fall.
Some involve physical remedies. Flood protection demands embankments, or DAMS, or protected flood plains, or houses that rise and fall with the waters.