名词
中文翻译：Unknown
同义词：
['可变密度轨道、可变密度轨迹、可变密度航线例句：1. The variable-density track is designed to optimize the transportation of goods.（可变密度轨道旨在优化货物的运输。）']
例句：
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1. The variable-density track is designed to optimize the transportation of goods.
可变密度轨道旨在优化货物的运输。
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2. The variable-density track has been widely used in various fields.
可变密度轨道在各个领域都有广泛应用。
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3. The variable-density track technology has greatly improved the efficiency of cargo transportation.
可变密度轨道技术大大提高了货物运输的效率。