说明：带进度条的状态栏，像IE一样，用于标示当前加载的文件进度。

With a progress bar, status bar, like IE, used to mark the progress of the file currently loaded.

youdao

说明：带进度条的状态栏，像IE一样，用于标示当前加载的文件进度。

With a progress bar, status bar, like IE, used to mark the progress of the file currently loaded.

youdao