But before she died she somehow slipped the microcassette into her pocket without her killer knowing it.

但在临死前，不知用什么方法，她把微型卡式录音带偷偷放进口袋，而凶手并不知道。

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Sherry discreetly opens up the safe and sees that the envelope addressed to the District Attorney contains Keith's secret microcassette.

雪莉偷偷地打开了保险柜，看到信封上所写的地址是寄给地区检察官的，里面装的是基思偷录的那盘录音带。

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