If necessary, an implementation can easily be swapped out for a different one at deploy time or even at run time.
如果必要，一个实现可以在部署时或甚至在运行时轻松交换为另一个实现。
Shared memory is pinned to RAM and cannot be swapped out.
功能内存与 RAM 固定，因而不能交换出去。
If your JVM is swapped out of memory, GAE must spend additional time to start your entire application the next time a request comes in.
如果您的JVM被换出内存，那么在下一次请求到来时，GAE必须花费更多的时间来启动整个应用程序。
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