sub-fieldsCOCA²⁵⁴³³⁷⁺⁶BNC⁷²⁸³⁹ 基本例句 分场原型sub-field的复数 Speaker recognition is the most natural biometric identification technique. It can be divided into two sub-fields: speaker identification and speaker verification. 说话人识别是最自然的生物特征身份鉴定方式，可分为说话人辨认和说话人确认。 fabiao