哲学家提出了一个关于现实本质的深刻问题。

The philosopher asked a ___profound question about the nature of reality.

他的理论看似简单，却异常深刻。

His theories were deceptively simple, yet remarkably ___profound.

她对历史文本的分析既深刻，又广受学者赞誉。

Her analysis of the historical text was both ___profound and widely acclaimed by scholars.