我们在谈论很基本的问题，甚至在牛顿之前。
We're talking about something much, much more basic, even pre-Newtonian.
只不过是因为地理的关系使牛顿和笛卡儿接触到了新的问题罢了。
It was just that geography thrust new questions on Newton and Descartes.
牛顿要思考许多复杂的问题，以致他常常心不在焉。
Newton thought about so many problems he was often absent-minded.
牛顿要思考许多复杂的问题，以致他常常心不在焉。
Newton thought about so many problems he was often absent-minded.
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