According to Professor Pretty, it was a conservative estimate.
根据普雷蒂教授的说法，这是一个保守的估计。
The concept of a shadow biosphere, according to Professor Davies, "is still just a theory".
“阴影生物圈”的概念，戴维斯教授说，“只是一个理论而已。”
It took him about two days, however, according to a professor there.
但该大学的一名教授称，这位学生花了大约两天时间才做出证明。
The story was written according to a real professor John Nash.
这个故事是根据一个真实的约翰·纳什教授写的。
The story was written according to a real professor John Nash.
这个故事是根据一个真实的约翰·纳什教授写的。
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