We get a front, 12MP Center Stage camera and a 12MP Wide camera on the back. As always, you can use Apple accessories with the device, like the Magic Keyboard, Apple Pencil, or Apple Pencil Pro.
Apple’s laptops have slightly higher pixel density, at 227PPI and 254PPI for the MacBook Air and 16-inch MacBook Pro respectively. This trades a little legibility for screen real estate, while also catering for the closer viewing distance (the closer you get to a display, the larger things look). These choices dictate how physically large text and interface elements appear on the respective devices.
，这一点在PDF资料中也有详细论述
Hit "Run" to watch particles bounce around with quadtree-accelerated collision detection:
catch (InterruptedException e) { }
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