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探索频道纪录片《与霍金一起了解宇宙》 第19期

Paradoxes are fun to think about. 悖论很有意思 The most famous one is usually called 其中最为著名的便是 the grandfather paradox. "祖父悖论" I have a new, simpler version 我提出了一个全新而简洁的版本 I call the mad-scientist paradox. 我称之为"疯狂科学家悖论" I don't like the way scientists in movies are often 尽管我不喜欢影片常把科学家 described as mad, 刻画为异想天开的狂人形象 but in this case, it's true. 但此情此景下的确如此 This Jap is determined to create a paradox. 这个日本小子决计营造一个悖论情景 Even if it costs him his life. 即便要豁上自己的性命 Imagine somehow he's built a wormhole. 试想他以某种方法造出一个虫洞 A time tunnel that stretches just one minute into the past. 一个返回一分钟前的时间隧道 It may not sound like much, 这听上去没什么意义 but even one minute of time travel can cause real trouble. 但哪怕一分钟的时间旅行也会引起大麻烦 Through the wormhole, 通过这个虫洞 the scientist can see himself as he was one minute ago. 这位科学家得以看到一分钟之前的自己 But what if our scientist uses the 但假如我们这位主人公利用虫洞 wormhole to shoot his earlier self? 向一分钟之前的自己开枪呢 He's now dead, 此时他已一命呜呼 killed before he'd even finished assembling the pistol. 还未装好枪支就已被射杀 So, who fired the shot? 那么,开枪者又是谁呢 It's a paradox. 这便是一个悖论 It just doesn't make sense. 这完全说不通 It's the sort of situation that gives cosmologists nightmares. 这种情形是宇宙学家的恶梦 This kind of time machine would violate 这样的时间机器会违背 a fundamental rule that governs the entire universe 主宰全宇宙的基本法则 - that causes happen before effects 使因果关系颠倒 and never the other way around. 并始终与我们的常理相悖 I believe things can't make themselves impossible. 我相信不可能的事就不会发生 If they could, 倘若可以 then there'd be nothing to stop the whole universe from descending into chaos. 整个宇宙将不可避免地陷于混乱 So I think something will always 因此我认为终究会有状况发生 happen that prevents the paradox. 从而避免悖论的出现 Somehow there must be a reason why our scientist will never 也总会有某种原因避免 find himself in the situation where he could shoot himself. 那位科学家处在射杀自己的困境中 And in this case, I'm sorry to say, 既然如此,我只好遗憾地说 the wormhole itself is the problem. 虫洞本身就是问题所在 In the end, I think a wormhole like this one can't exist. 至此,我认为这样的虫洞根本不会存在 And the reason for that is feedback. 其原因就是"反馈" 来自:VOA英语网 文章地址: http://www.tingvoa.com/html/20170717/476412.html