The fingerprint identification has become one of the most popular, convenient and reliable personal authentication technologies due to its uniqueness and invariability.
由于指纹的唯一性和不变性，指纹识别已成为当前最流行、最方便、最可靠的个人身份认证技术之一。
Since fingerprint is an important feature of human body, it has become one of the important means for biometric test technique because of its uniqueness and invariability.
指纹作为人体的重要特征，由于其具有唯一性和终生不变性，越来越成为生物测定技术的重要手段。
Their absoluteness mainly refers to infiniteness and invariability while relativity denotes finiteness and variability.
其绝对性主要是指它们的无限性和不变性，其相对性主要是指它们的有限性和可变性。
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