前面介绍过电子邮件的功能，它通常传递一些简短的信息。对于大量的数据传输，则应使用文件传输（FTP）功能。文件传输是指在两台计算机之间传送数据。这里，数据的含义是广义的，它可以是程序代码、数字、文字、声音和图像等。在计算机中，数据以文件形式存放在磁盘中，按照文 Earlier introduced e-mail function, it usually pass some brief information. For large amounts of data transfer, the file transfer (FTP) function should be used. File transfer refers to the transfer of data between two computers. Here, the meaning of the data is broad, it can be program code, numbers, text, sounds and images. In a computer, data is stored on disk as a file, by text