名词
中文翻译：Unknown
同义词：
['trace', 'track', 'parallel']
例句：
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1.The detective followed the trail of clues to find the killer.
侦探顺着线索追踪凶手。
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2. They traced the origins of the virus back to a lab in Beijing.
他们追溯病毒的起源，发现它起源于北京的一个实验室。
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3. The car's parallel tracks allowed it to pass through the narrow bridge without delay.
汽车的平行轨迹使车辆能够顺利通过这座狭窄的桥梁。