心脏病的发病原因是多因素的，包括遗传、饮食和压力。

Heart disease is a ___multifactorial condition involving genetics, diet, and stress.

这项研究采用了多因素分析来评估饮食和运动对健康的影响。

The study used a ___multifactorial analysis to evaluate the effects of diet and exercise on health.