新课标高中英语必修5课文翻译与要点unit1

to他曾经收集过观them.察星球的数据，并且利用他的全部数学知识But 来解释这些数据。 onl y theorynewhis

could do that.但是只有他的新理论才能作出解释。So

between 1510 and 1514 he worked on

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improving it,

gradually until he felt it his theory

于是，他was

complete.间1514年

期至在1510从事这项研究，逐步修改他的理论，直到他感 到完善时为止。it he In

1514 showed privately to his friends.1514年，他把他的新理论私下里给他

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The 们友看。的朋 chang es he made to the were old theory

他对旧理