名词
中文翻译：单位长度上的转动次数
同义词：
['turns per unit', 'number of turns', 'turns per unit length']
例句：
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1. The car has 20 turns per kilometer.
这辆车每公里有20个转弯。
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2. The engineer calculated the number of turns required for the project.
工程师计算了完成这个项目所需的转弯次数。
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3.The team had to make several turns before reaching the finish line.
队伍在到达终点线之前不得不转了几个弯。