这样的窥探之所以能够实现，是因为每一个键都有其独特的咔嚓声，此声由该键在键盘所处的位置、打字者的力度及其手的位置和所使用的键盘类型共同决定。
Such snooping is possible because each key produces a characteristic click, shaped by its position on the keyboard, the vigour and hand position of the typist, and the type of keyboard used.
照的是侧影，看得出来，摄相者，不管是谁吧，喊她的名字，然后咔嚓按了快门，这她刚好转头过来。
The picture would have been in profile, but it appeared that the photographer, whoever it was, had called her name just before snapping the shutter and she’d turned her head.
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