Albert Einstein is said to have bee

Albert Einstein is said to have been asked by a student, "what finding helped you most when you
were__1__the theory of relativity?" Einstein replied without__2__moment’s hesitation. "Finding
how to think about the problem."
The same__3__is told about Sir Isaac Newton and__4__other scientists. We have no proof
__5__any of these well-known conversations__6__took place, but we are prepared to believe
that they did, and, if so, that the__7__was the same one Einstein gave,__8__this is the "way
scientists work and science progresses."
Scientists usually work toward models of the process of structure they are studying.__9__we
have models of the structure of the universe and of the atom, models of the process__10__which
thegenetic(遗传的) pattern is passed from one building block of life to_11__models of the
economic system and__12__on. Some models are mathematical, but a model does not have to
haveequations(方程) or even diagrams; the__13__requirement is no doubt that it_14__an
insight(洞察) into the relationships that determine__15__something works as it does or how it
is put together.

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