Maintaining a density of 80 pixels per inch over an area several feet on a side implies displaying tens of millions of pixels.
一方面在几英尺的区域内保持每英寸80个像素密度意味着显示上千万个像素。
The exact physical pixels per inch of the screen in the X dimension.
译：在屏幕的X方向，每英寸有多少个物理像素。
RESOLUTION - Printed photographs should be scanned at a sampling frequency of at least 300 pixels per inch.
分辨率-打印出的照片应按高于每英寸300像素的抽样率进行扫描。
Every screen has pixels-per-inch (PPI) characteristic. This number tells you how many pixels fit into one inch and thus how large the pixels appear in the real world.
每一个屏幕都有一个每英寸像素(PPI)的特性。这个数字告诉你一英寸显示多少像素，也就是一像素在真实世界里显示的大小。
Every screen has pixels-per-inch (PPI) characteristic. This number tells you how many pixels fit into one inch and thus how large the pixels appear in the real world.
每一个屏幕都有一个每英寸像素(PPI)的特性。这个数字告诉你一英寸显示多少像素，也就是一像素在真实世界里显示的大小。
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