漫长的战役模式挨个介绍了游戏的所有功能，沙箱模式能够帮助你建设自己的核心据点。
A lengthy campaign mode introduces all of the game's features one by one, and a sandbox mode let's you build to your heart's content.
此沙箱是在32位模式下的虚拟地址空间，这始终是一个4gb的内存地址块。
This sandbox is the virtual address space, which in 32-bit mode is always a 4gb block of memory addresses.
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