How and where man learnt how to produce flame at will is unknown.
人类是如何并且从哪儿学到怎样去生产火焰当将来是未知的。
The fuel used does not produce a flame in a vacuum.
这种燃料在真空中不会产生火花。
More hands produce a stronger flame. Let's build our gardon with our own hands! What are you waiting for? Action!
众人拾柴火焰高。让我们用我们自己的双手建设我们的家园！还在等什么呢？行动吧！
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