... 无水产油量 breakthrough recovery 无限期关井 infinite closed-in time 无形钻井费用 intangible drilling cost ...
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Note that in a closed universe you could start a journey off in one direction and, if allowed enough time, ultimately return to your starting point; in an infinite universe, you would never return.
请注意,在一个封闭的宇宙你可以朝着一个方向开始旅行,如果允许足够的时间,最终将返回到出发点;而在一个无限的宇宙中,你永远不会回来。
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