"It is 13 years since I wrote a Brief History," Hawking writes.

霍金说：“距离写《时间简史》一书已经有13年了。”

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Spontaneous creation is the reason there is something rather than nothing, why the universe exists, why we exist," Hawking writes.

自发创造可以解释宇宙中并非无物存在、为什么宇宙存在以及为什么我们存在。

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Scientists, on the other hand, Hawking writes, know that their job is never finished and that even the best theory can turn out to be wrong.

霍金写到，从另一个方面说，科学家知道他们的工作是永无止境的，即使是最完美的理论，也可能是错误的。

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