说明：  商品化的软件产品普遍需要提供在线升级功能,所谓在线升级首先必须要从Internet站点上下载文件,然后再对下载的文件做处理.由于网速和文件大小等方面的因素,在文件下载过程中显示下载进度指示可以使产品更赋有人性化
(Commercialization of software products generally need to provide online upgrade feature, the so-called first-line upgrade must download files from the Internet site, and then download the file to do the deal because of factors such as speed and file size issues, the file download process Show download progress indicator can assign someone to make products more personalized)