Adjective:

1. produced by living organisms or biological processes;

   "fermentation is a biogenic process"
   

2. essential for maintaining the fundamental life processes;

   "sleep and food and water are among the biogenic needs of the organism"
   

biosis生命现象bion.个人经历pref.表示“生命”；“生物”Biodegradable function生物降解biodiversity of fishes鱼类的生物多样性Biomagnetic Seperation磁泳biofloculation process生物絮凝法bio-organic detritus生物有机碎屑Bio - tech companies生物科技企业biotech interest group生物技术利益集团Biomphalaria adowensis阿杜华双脐螺biogenetic stimulation生物原刺激素Biomechanical analyses生物力学分析

1. Thus perhaps even clouds and rain may be biogenic.
   以此推论，甚至乎云层雨水也是由生物活动产生的。