战争的基石
Cornerstone of war
以上为机器翻译结果，长、整句建议使用 人工翻译 。
火箭变得更大也更有破坏性。重要的是，它更高的可控性使之成为了战争中有效的武器，而且，这也是探索外太空的基石。
Most importantly, they became controllable, which suddenly made them useful both as weapons of war and, even more vitally, as our means of accessing outer space.
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