地球环境的不可逆变和生物物种的进化，是驱动生态系统进化的基本因素。
The main factors, which drive ecosystem to evolve, include the earth environment's non-converse evolvement and biology species' evolvement.
牙菌斑生物膜是龋病和牙周病的主要致病因素，也是目前口腔微生物学和生态学研究的热点。
Dental plaque biofilm is one of key etiological factors of dental caries and periodontal diseases, and is also the hotspot of oral microbiology and ecology.
各种生态环境因素包括光、温度、土壤、空气以及生物因素均影响到药用植物的次生代谢过程。
The anabolism of secondary metabolites is influenced by many ecological environment factors including sunlight, temperature, soil, air and biological factors.
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