决定因素 decisive factor; 积极因素 positive factor; 关键因素 the key facter; 致病的因素 factor in the causation of disease; 社会因素 social factor; 主导因素 leading factor; 基本因素 essential element; 人的因素 the human factor; 调动一切积极因素 bring every positive factor into play; 考虑到各种因素 taking all factors into consideration; 决定战争的各种因素 various factors that determine the war; 勤奋和机遇是他成功的两大因素。 industry and opportunity were the chief factors in his success