Watchmakers kept the secrets they learned in their lonely working hours.
制表师们都各自保留着他们在孤独工作时知悉的钟表的秘密。
It was excellent drill for their memories, a harmless amusement, and employed many hours which otherwise would have been idle, lonely, or spent in less profitable society.
这种有益的娱乐活动可以很好地锻炼她们的记忆力，并可以打发闲暇，排遣寂寞，减少无聊的社交。
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