As a class activity or common interest group go on a visit to a bush area with a spokesperson to explain the characteristics of plant species and their niche in the natural environment.
课堂活动或共同兴趣小组去拜访某人，丛林地区发言人解释植物的特点和他们的利基在自然环境中。
The paper puts forward environmental protection measures according to the characteristics and ecological environment problems of Puti Islet Natural Reserve.
根据唐山菩提岛自然保护区的特点和存在的生态环境问题，提出了保护措施。
The causes of land degradation not only include the natural factors, such as the characteristics of land resources and the natural environment, but also the social and economic factors.
产生土地退化的原因，不仅仅是土地资源特点与自然环境这样一些自然因素，还包括一些社会与经济因素。
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