rational egoism的用法和樣例：
例句
- The former offers a universal foundation of human nature while the latter supports the rational egoism pragmatically.
前者為合理利己主義的證立提供了普遍的人性基礎，而後者則為合理利己主義的推行提供了來自現實功利的有力支待。 - Rational egoism can be regarded as an ethnical theory when rational points of view are stated.
摘要合理利己主義不失為一種可以作為理性觀點申述的倫理學觀點。
