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.
独特的生物学特性、生态环境被破坏、过度采挖、科研滞后等因素是导致石斛资源危机的根源。
Some factors such as unique biological property, the damage of ecologic environment, overexploitation and late investigation on it were the resource of dendrobium's resource crisis.
害虫生物学特征、树龄、气候条件和生态环境等都是影响害虫群落结构及动态的主要因素。
The main factors affecting on the community structure and dynamics of the pests were the biological characters of pests, age of lichee tree, climates and ecological circumstance of the orchard.
因此我们必须对影响流域生态系统的有关因素，包括水、土、生物及相关资源进行综合管理。
We must therefore take integrated management of relevant factors, which may influence the valley ecosystem, including water, soil, biology and associated resources.
文化和自然因素的结合，比如在生物圈保存中，应该以生态旅游的方式来向游客们介绍。
Combination of cultural and natural elements, for instance in biosphere reserves, should be provided to tourists in the form of properly managed "ecotourism".
媒介生态学将人类社会视为一个生态系统，而将媒介与受众视为存在其中的生物因素。
Media ecology of human society as an ecosystem, and the media will be there with the audience as the biological factors.
由于近海水域生态环境因素的变化，赤潮生物常常侵袭到海水养殖池塘中，给养殖业造成严重威胁。
Due to the changes of the aquatic environment throughout the coastal area in the world, the red tides keep on bringing damage to the breeding ponds, which has caused serious impacts.
将水坝对河流生态系统的影响因素划分为非生物要素和生物要素两大方面，并根据影响程度划分为三个等级；
Factors affected on dams were divided into two sections: abiotic factor and biotic factor, and the degree of effects was divided into three grades;
将水坝对河流生态系统的影响因素划分为非生物要素和生物要素两大方面，并根据影响程度划分为三个等级；
Factors affected on dams were divided into two sections: abiotic factor and biotic factor, and the degree of effects was divided into three grades;
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