那位坚持不懈的侦探花了十六年反复重启悬案调查，终于找到了那名失踪的证人。
The tenacious detective spent sixteen years reopening the cold case until he finally located the missing witness.
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解释
tenacious 在此形容人面对多年挫败仍不放弃追查的精神执着。
The tenacious detective spent sixteen years reopening the cold case until he finally located the missing witness.
tenacious 在此形容人面对多年挫败仍不放弃追查的精神执着。