智利圣地亚哥的三名大学生发明了一种能为手机充电的植物供电设备。
Three university students in Santiago, Chile, have developed a plant-powered device to charge their mobile phones.
第三，数码录音设备可以让观众更好地控制观看什么样的广告。
Third, digital recording devices allow audience members more control over which commercials they watch.
大约五年前，美国高三学生每天花在电子设备上的时间一般超过六小时。
Some five years ago, high school seniors in America generally spent more than six hours a day on electronic devices.
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