The diagram illustrates the 'complexity' of the cell's structure.
He doesn't grasp/understand the 'complexity' of the situation.
He was impressed by the 'complexity' of the music.
(..) in the Laurentian system. Kirk, I'm promoting you to first officer. - What? - Captain? Please, I apologize. The complexities of Human pranks escape me. It's not a prank, Spock. And I am not the captain, you are. Let's go. Sir, after we knock out that drill, (..)2009 Star Trek