knowledge hierarchy的用法和樣例：
例句
- Natural science is a body of systematized knowledge which is accumulating at an almost surprising rate.
自然科學(xué)是一種系統的知識體系，這種知識體系正在以幾乎驚人的速度積累起來(lái)。 - The world-wide moral predicament in the modern time owes itself to the fundamental change of ultimate knowledge in the human epistemic system.
道德效力的意識性決定了道德效力的根基須是人類(lèi)知識體系中的極限性知識。
