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1. He carried a pocket chronometer in his pocket to keep track of the time during the long flight.
他在口袋里携带了一个口袋钟，以便在长途飞行中跟踪时间。
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2. The old man kept a pocket chronometer as a reminder of his youthful days.
老人保留着一个口袋钟，作为他年轻时的提醒。
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3. She wore a pocket chronometer on her wrist as a fashion statement.
她手腕上佩戴了一个口袋钟，作为一种时尚声明。