But those graphics tended to be a bit ugly, because PHP's image library is primitive and doesn't support effects.

但是这些图像往往很简陋，因为php图像库非常原始，不支持特效。

youdao

Because the 8-bit PNG and GIF formats have the potential to result in much smaller image files, try to keep this in mind when creating graphics and illustrations for your site.

8 - bit PNG和gif格式能提供更小的文件尺寸，所以在为你的网站制作图像和插画时请牢记这些。

youdao