名词
中文翻译：Unknown
同义词：
['parallel line', 'parallel plane', 'parallel axis']
例句：
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1. The car is parked parallel to the road.
汽车停在路旁，与道路成平行。
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2. The engineer drew a parallel between the two systems.
工程师在两个系统之间画了一条平行线。
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3. The scientist used a microscope to observe parallel lines in the crystal.
科学家使用显微镜观察晶体中的平行线。