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1. The by-pass canal is a crucial part of the city's transportation system.
旁路运河是城市交通系统的重要组成部分。
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2. The construction of the by-pass canal has greatly improved the efficiency of the city'straffic flow.
旁路运河的建设大大提高了城市交通流量的效率。
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3. The by-pass canal was designed to divert traffic away from the main road, reducing congestion.
旁路运河的设计是为了将交通引向主路，减少拥堵。