Biological factors play a major role in the development of mental illness. 生物因素在精神疾病的发展过程中起着很重要作用。
Herbivory and the interaction with epiphytes are the most important biotic factors affecting the biomass and production of seagrasses. 非生物因素一般有最适合海草生长的范围,生物因素的影响具有两面性。