动词短语
中文翻译：跟踪曲线
同义词：
['trace', 'following', 'tracking']
例句：
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1.The scientist was tracing the path of the river.
科学家正在跟踪河流的路径。
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2.The engineer was following the design of the new bridge.
工程师正在按照新桥的设计施工。
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3.The detective was tracking a suspect's movements.
侦探正在追踪嫌疑人的行动。