没见过爱情的真面目，就不会懂得它的独一性。
Never seen the true face of love, it will not understand its uniqueness.
没见过爱情的真面目，就不会懂得它的独一性。
Have not seen the true face of love, you will not know its unique.
与传统的身份识别技术比拟，生物特性自身具有普遍性、稳固性和独一性。
Compared with the traditional verification technology, the biometrics verification has universality, stability and uniqueness.
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