After more than a decade of hype, biometrics-the use of body measurements such as eye scans or fingerprints to determine or verify identity-is finally taking off.

生物识别是指通过检测人体的某部分(例如眼睛、指纹)来检测或验证身份，经过十几年的大量宣传，此技术的应用终于推广开来。

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When taking a shower or bath, our outer later of skin expands. This causes wrinkles and enlarges our fingerprints.

沐浴或者泡浴时，我们皮肤表层会扩张，导致指纹出现皱纹、涨大等情况。

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We are now taking steps to ensure that we no longer retain the DNA and fingerprints of innocent people.

BBC: DNA crime-fighting in UK 'lagging behind', experts say