这并不是说面包师或卖肉者所用的磅秤和化学家所用的天平在构造原理或工作方式上存在差别,而是说与前者相比,后者是一种更精密得多的装置,因而在计量上必然更准确得多。
3. You have all heard it repeated that men of science work by means of induction (归纳法) and deduction, that by the help of these operations, they, in a sort of sense, manage to extract from Nature certain natural laws, and that out of these, by some special skill of their own, they build up their theories.
你们都多次听说过,科学家是用归纳法和演绎法工作的,他们用这些方法,在某种意义上说,力求从自然界找出某些自然规律,然后他们根据这些规律,用自己的某种非同一般的本领,建立起他们的理论。
4. And it is imagined by many that the operations of the common mind can be by no means compared with these processes, and that they have to be acquired by a sort of special training.
许多人以为,普通人的思维活动根本无法与科学家的思维过程相比,认为这些思维过程必须经过某种专门训练才能掌握。
5. Probably there is not one here who has not in the course of the day had occasion to set in motion a complex train of reasoning, of the very same kind, though differing in degree, as that which a scientific man goes through in tracing the causes of natural phenomena.
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