Google street view provides panoramic views of streets gathered by webcams .

google街景提供由网络摄像头收集到的街道的全景照片。

In fact , webcams that monitor a person 's heart rate are soon to appear .

事实上，能够测量人们的心率的网络摄像头马上就要面世了。

Voice commands and gestures are becoming more sophisticated and webcams offer facial recognition and authentication .

语音命令和手势识别技术日益成熟，网络摄像头现在能够进行面部识别和验证。

These range from remote-controlled lighting and floor sensors to more elaborate set-ups integrating webcams and videoconferencing systems with the internet .

这些技术包括遥控灯、地面传感器，以及更为复杂的、将网络摄像头和视频会议系统与互联网整合起来的装置。

Technology introduces a fourth break from the past : the huddled masses reached ellis island without cellphones or webcams .

科技的发展引入了突破过去的第四个不同点：以前拥挤地登上埃利斯岛的美国移民先辈们没有手机或者网络摄像头。