该评价体系包含两个主要方面的评价因子，即综合客体评价体系和环境感知评价体系。
The evaluation system includes two main aspects of the evaluation factors, namely, integrated object evaluation system and evaluation system for environmental awareness.
具有精心选育的禽肉和禽蛋类型的商业养殖体系需要适当的物质环境，最佳的营养和有效的疫病防控。
Commercial production systems with highly selected meat or egg types of poultry require a suitable physical environment, optimal nutrition and efficient protection from the effects of disease.
正如名字包含的意义一样，该网站关注的是诸如能源和粮食体系这样的环境问题。
As the name implies, it focuses on environmental matters such as energy and food systems.
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