注意：图像的屏幕高宽比定义为图像的宽W和它的高H的比值。
NOTE: The aspect ratio of the picture is defined to be the ratio of the picture width W to its height H.
iPhone屏幕的高宽比也与典型的桌面或笔记本电脑的显示器有巨大的差别。
The iPhone screen also has a significantly different aspect ratio from a typical desktop or laptop monitor.
iPhone屏幕的高宽比也与典型的桌面或笔记本电脑的显示器有巨大的差别。
The iPhone screen also has a significantly different aspect ratio from a typical desktop or laptop monitor.
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