The structure of the brain is complicated.

Source: Tatoeba

The machine was too complicated for us to find out the cause of the trouble.

Source: Tatoeba

I like to take things apart to see what makes them tick.

Source: Tatoeba

In China, there is a large number of characters, so the goal of the character simplification was to replace the complex traditional characters with easy to remember simplified characters and increase the literacy rate.

Source: Tatoeba