The rectangular antenna in the middle transmits and receives radio waves . the four cylindrical loudspeakers surrounding it emit sound waves into the atmosphere 中间的长方形天线作用是发放和接收无线电波，周边的四个圆柱形扩音器则向空中发出声波。
Audio , images , video , etc . ) can be viewed as a communications problem in which the watermark must be transmitted and received through a " watermark channel " 多媒体中的数字水印可以被看作为是一个通信问题，水印通过一个水印信道被传送和接收。
Most of our amateur equipment transmits and receives a much broader audio bandwidth and has no special tone filters , so most hear the tones 而大多数业余设备则在发射和接收的时候处理更宽一些的声音频宽，所以，通过大部分这样的设备能够听到音频信号。
The new service , a twist on videophone products which have been around for years , will enable users to transmit and receive their images as they communicate 这一新的服务项目是从可视电话上演化而来的，它容许用户们在通讯时同时接收到对方传来的图像。
At the beginning of the twentieth century , there were four powerful means of transmitting and receiving information over long distances : print , photography , telegraph and telephone 在20世界初，远距离发出和接收信息的有效手段有四种：印刷、照像、电报和电话。
In microwave system the separate input from various sources must be brought together to give a composite input which is then transmitted and received by radio 在微波系统中，来自各处的分散的输入必须被汇集在一起，以形成一个综合的输入，然后由无线电发送和接收。
With super g3 mode which incorporates a 33 . 6 kbps high - speed modem , the mf3800 transmits and receives fax documents in digital format at less than 3 seconds a page 拥有33 . 6kbps高速调解器的superg3模式，让mf3800能以每页少于3秒时间传送及接收数码化的文件资料。
At the beginning of the twentieth century , there were four powerful means of transmitting and receiving information over long distances : print , photography , telegraph and telephone 在20世纪初，有四种远距离传送信息和接收信息的有效方式：印刷、摄影、电报和电话。
With super g3 mode which incorporates a 33 . 6 kbps high - speed modem , the fax 2900 transmits and receives fax documents in digital format in less than 3 seconds per page 拥有33 . 6kbps高速调解器的superg3模式，让fax2900能以每页少于3秒时间传送及接收数码化的文件资料。
As the mimo system implies multiple antennas in both transmit and receive sides , the design of multiple antennas becomes very important in the next generation of wireless communication Mimo技术在接收和发射端都引入了多天线,因此多天线的设计在新一代移动通信中显得尤为重要。
