宇宙的无边界也许就是人类想象的极限也比这个边界小，所以它就是无际的。
The blundlessness of the universe dwarfts the limitation of human imagination, that's why it's endless.
霍金为了解决奇点疑难问题，引入了虚时间，构建了无边界宇宙模型。
In order to solve universe singularity problem, Hawking introduces imaginary time and establishes no-boundary universe model.
无边界宇宙模型是霍金为解决宇宙奇点问题所提出的一种新宇宙理论。
To solve the problem of singularity in cosmos explosion, Stephen Hawking proposes a new cosmos theory, namely the no-boundary cosmos model.
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