许多智能手机现在使用面部识别来解锁设备。

Many smartphones now use ___facial-recognition to unlock the device.

这款安全系统使用面部识别技术来识别访客。

This security system uses ___facial-recognition to identify visitors.

机场使用人脸识别技术来加快乘客登机流程。

The airport uses ___facial-recognition to speed up passenger boarding.