Small changes in the movement of Neptune led several astronomers to believe that an undiscovered planet was affecting Neptune's orbit.
VOA: special.2010.07.11
So he came up with the ideas that led to the idea of Lewis structures in the very early 1900's.
他就提出了这个想法,进而发展出了路易斯结构在二十世纪初。
Misunderstood as a satire on the Irish peasantry, Yeats's production of the play led to riots in 1909.
被误解为对爱尔兰农民的嘲讽,此剧引起了1909年的暴乱。
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