这是因为当服务器或服务器框架交换出时，可以将一个单元旋转出生产而通过其他单元来处理负载，从而进行内存和CPU升级。
This is because a cell can be rotated out of production, with the other cells handling the load while servers or server frames are swapped out so that memory and CPU upgrades take place.
它很轻巧，而且是基于浏览器的，旋转地球只占用303kb的内存——太适合iPhone了。
It is a lightweight, browser-based, spinning globe that only takes up 303kb of memory-perfect for an iPhone.
视图控制器也可以显示独占的视图、回应低内存警告，以及当方向改变时旋转视图。
View controllers can also display modal views, respond to low-memory warnings, and rotate views when the orientation changes.
视图控制器也可以显示独占的视图、回应低内存警告，以及当方向改变时旋转视图。
View controllers can also display modal views, respond to low-memory warnings, and rotate views when the orientation changes.
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