Usually, to ensure that the flow downstream remains unaffected during the period of construction of a dam, the water is diverted through streams around the construction site and returned to the river.
通常，为确保下游地区在大坝建设期间不受影响，水流被分流进建设区域后，将再被引回江内。
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Usually, to ensure that the flow downstream remains unaffected during the period of construction of a dam, the water is diverted through streams around the construction site and returned to the river.