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1. The shuttle working between the two cities is efficient and reliable.
往返于两个城市的穿梭工作既高效又可靠。
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2. The shuttle working system has greatly improved the efficiency of transportation.
穿梭工作系统大大提高了交通效率。
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3. The shuttle working between the two countries will be crucial for their economic development.
两国之间的穿梭工作将对它们的经济发展至关重要。