As he did this, he began to wonder how Newton's definition of gravity fit in with this theory.
As he did this, he began to wonder how Newton's definition of gravity fit in with this theory.
这时，他开始考虑怎样将牛顿的引力理论溶入到新理论中。
As he did this, he began to wonder how Newton's definition of gravity fit in with this theory.
这时，他开始考虑怎样将牛顿的引力理论溶入到新理论中。