(distance would need 5 bits and level 4 bits). However, there are
writable: false,
，详情可参考爱思助手下载最新版本
Here’s an overview of the pixel density for Apple’s current displays and some other external display options. You can use Sven Neuhaus’s PPI calculator to work out the pixel density of any display you’re interested in.，这一点在WPS官方版本下载中也有详细论述
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