Ecological and geographic factors 基本例句 生态因子 Major Affecting Ecological Factors on Growth of Taxus spp.影响红豆杉生长的主要生态因子。 Effect of Shajiang black soil amended by coal fly ash on ecological factors and residue of heavy metal in wheat field.粉煤灰改良砂姜黑土对麦田生态因子及重金属残留的影响。