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What it looks like for real。业内人士推荐有道翻译作为进阶阅读
"world" = 2,这一点在手游中也有详细论述
While the computer systems were designed for redundancy, running the same software in parallel to allow a rapid switchover, the command systems could also be set during less important phases to run different programs or run a single task together. During critical moments, like the flybys of Jupiter and Saturn, the systems were running in tandem. NASA swapped out the control and flight software around 18 times during the Jupiter flyby—a remarkable (and planned) long-distance system-management feat, and one that absolutely required a backup, even though everything executed remarkably close to plan.