flushing canal

例句：

1. 1. The flushing canal is crucial for maintaining the cleanliness of the river.
   冲洗渠道对于保持河流清洁至关重要。
2. 2.The engineers designed a flushing canal to divert the floodwaters.
   工程师们设计了一个冲洗渠道来转移洪水。
3. 3.The flushing canal was used to test the effectiveness of the new water treatment plant.
   冲洗渠道被用来测试新水厂的有效性。