这是一个困扰思想家数个世纪的哲学问题。
This is a ___philosophical problem that has puzzled thinkers for centuries.
拉尔夫开始向皮吉征求意见,并问他哲学问题。
Ralph started taking advice from Piggy and asking him ___philosophical questions.
她的哲学著作探讨现实的本质。
Her ___philosophical writings explore the nature of reality.