the first man to base a theory of atomic constitution of matter o_英语解答

the first man to base a theory of atomic constitution of matter on proved facts was Dalton
请问这句话的意思,
base a theory

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解答

第一个将物质的原子构成论基于确证事实的人是道尔顿.
base a theory是把一个理论基于.之上