Translation of "complexity" into Chinese

He's contemplating the complexity of contemporary life.

他思考着现代生活的复杂性。

The natural world is always much more complex than formulations in the lab or blueprints in the design office.

自然界从来都比试验室的配方或设计院的图纸里所反映的要复杂得多。

Tom's explanation was too complex.

Tom的説明太複雜了。