2.Note that the comparison to a traffic light which emits one color and then another is a little inaccurate because your smartphone's circuitry generates one frequency, called a carrier wave.
请注意, 与
出一种颜色然后
出另一种颜色的交通信号灯的比较有点不准确, 因为智能手机的
路会产生一种频率,称为载波。机翻