天文学家们认为，“地球是宇宙的中心”这种说法是非常直观、合情合理的，以至于当他们发现与地心论不符的现象时，也会想办法找理由去解释。
It was so intuitive, so sensible that the Earth was the center of the universe that astronomers found ways to explain those seemingly inconsistent phenomena within the geocentric view.
从一个角度看，部分稳固论似乎是完全直观的。
Viewed from one perspective, the doctrine of mereological constancy can seem fairly intuitive.
组合恒等式在组合数学中占有重要的地位，它有多种证法，运用集合论的观点，求导法则和概率方法对几个重要的组合等式给出了直观简洁的证明。
This paper USES the set theory, derivation principles and probability method to give a direct and simple solution to several important combinatorial identities.
组合恒等式在组合数学中占有重要的地位，它有多种证法，运用集合论的观点，求导法则和概率方法对几个重要的组合等式给出了直观简洁的证明。
This paper USES the set theory, derivation principles and probability method to give a direct and simple solution to several important combinatorial identities.
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