英语翻译
Nor did he let the disease stop him from living the kind of life he had always dreamt of.
To explain what they have seen,they build a theory about the way in which things happen and the causes and effects.
Finally,the scientists test the theory to see if it matches what they have seen and if it can predict future events.
If what they are observing can be tested in a practical way,scientists will use experiments.But if,like Hawking,they are studying something that is too large or too difficult to obserse directly,they will use a model to test the theory.
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