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1.The ballast train was used to transport heavy equipment across the mountain range.
避雷车被用来在山区运输重型设备。
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2.The engineers were monitoring the ballast train's performance closely.
工程师们正在密切监控避雷车的性能。
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3. The ballast train was designed to withstand extreme weather conditions.
避雷车的设计能够承受极端天气条件。