发现河流的输入和输出，就是测量每一条流入和流出的河流的流量。
Discovering the inputs and outputs of rivers is a matter of measuring the discharges of every inflowing and outflowing stream and river.
每次我们洗牛仔裤的时候，小块的牛仔布就会从洗衣机里流出来，流入世界上的河流、湖泊和海洋。
Every time we wash our jeans, tiny bits of denim will flow out of our washing machines, down into the world's rivers, lakes and oceans.
近来，你在春池的河流出口处建造和维护了木堆水坝，这是违规的。
Construction and maintenance of two wood debris dams across the outlet stream of Spring Pond.
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