You should always create a couple of generic images, one JPEG and one GIF, because some devices will accept JPEG images, and some will accept GIF, but not both.
您应该创建两张普通图片，一张是jpeg格式的，另一张是gif格式的。因为有些设备接受jpeg格式的图片，另一些接受gif格式的，而不是两者都接受。
It is very possible that the GIF image will display just fine in your browser even though a GIF is a binary file type.
尽管GIF是二进制文件类型，GIF图像仍然很可能在浏览器中正常显示。
A sequence of GIF images can be stored in a single file to form an animated GIF.
在单个文件中存储一系列GIF图像可以形成一个动画gif。
A sequence of GIF images can be stored in a single file to form an animated GIF.
在单个文件中存储一系列GIF图像可以形成一个动画gif。
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