答：科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。虽然它们都会引起肝病，但在重要方面又有所不同。

A: Scientists have identified five unique hepatitis viruses, identified by the letters a, b, c, d, and E. While all cause liver disease, they vary in important ways.

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科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。 虽然它们都会引起肝病，但在重要方面又有所不同。

Scientists have identified five unique hepatitis viruses, identified by the letters A, B, C, D, and E. While all cause liver disease, they vary in important ways.

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因为每个“通用识别码”会跟生物辨识标记绑定，任何人只要有这个号码，就能超越合理怀疑，证明他就是自己声称的那个人。

Because each "universal identity number" (UID) will be tied to biometric markers, it will prove beyond reasonable doubt that anyone who has one is who he says he is.

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