当时你站在便池上挂一个钟，不小心就摔倒了，你的头撞到了排水槽上……而这就是使得时间旅行成为可能的一个原因。
You were hanging a clock. You fell and you hit your head on the sink…which is what makes time travel possible.
当时你站在便池上挂一个钟，不小心就摔倒了，你的头撞到了排水槽上……而这就是使得时间旅行成为可能的一个原因。
You were standing on your toilet. You were hanging a clock. You fell and you hit your head on the sink... which is what makes time travel possible.
然而，如果这一切成为可能的话，那么将会出现一些非常令人困惑的逻辑混乱…比如，如果某人或某物逆时间旅行并改变随之发生的情况，那会发生什么情况呢？
If it were possible, however, it would present some pretty knotty paradoxes... For example, what if someone or something traveled back in time and changed the ensuing future?
然而，何时能够进行超光速旅行，何时人类克隆技术能够完善，何时时间旅行可以成为可能，他仍未作出预告。
However, there are still no forecasts for when faster-than-light travel will be available, or when human cloning will be perfected, or when time travel will be possible.
然而，何时能够进行超光速旅行，何时人类克隆技术能够完善，何时时间旅行可以成为可能，他仍未作出预告。
However, there are still no forecasts for when faster-than-light travel will be available, or when human cloning will be perfected, or when time travel will be possible.
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