虹膜扫描可以在远距离操作。
除了指纹扫描，许多制造商正在考虑虹膜扫描。
In addition to fingerprint scans, many manufacturers are now considering iris scanning.
新的生物特征护照，包含指纹和虹膜扫描的细节，也会增加识别能力。
New biometric passports, which contain details such as finger prints and iris scans, will also improve identification.
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