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。

youdao

By comparison, my N900 is 267 pixels per inch -- granted with only 800 x 400 display.

iPad是每英寸132个像素，对比之下，我的N900是每英寸267个像素，在一个800x400的屏幕之下。

youdao

Being relatively small, the screen had a resolution of a then-unheard-of 200 pixels per inch (ppi).

一款相对较小的显示器，它拥有一个前所未闻的每英寸200像素的显示屏。

youdao

It has a paper white display. 25% more contrast. 212 pixels per inch. 62% more pixels.

FORBES: Amazon Live From Santa Monica: New Kindle Paperwhite, Kindle Fire HD, More (Updated)

The display is a 4.7 inch 720 pixel HD with a pixel density of 315 pixels per inch.

FORBES: Move up http://i.forbesimg.com t Move down

Pantech's Android-powered Vega No 6 features a 5.9in (15cm) display, which packs in 373 pixels per inch.

BBC: Pantech Vega No 6