Many theories of natural science are held to be true not only because they were so considered when natural scientists originated them, but because they have been verified in subsequent scientific practice.

 
  • 许多自然科学理论之所以被称为真理,不但在于自然科学家们创立这些学说的时候,而且在于为尔后的科学实践所证实的时候。
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