兽用药物在环境中的转归及其对生态环境的潜在危害逐步受到人们的关注，目前已成为国内外研究的一个热点。
The fate and potential impact to ecosystem for veterinary medicines has aroused great concern over the last decade, and has become one research hotspot in the world now.
过度捕捞和环境恶化破坏了渤海生态系统的结构，使生物群落生产力下降，生态系统的稳定性转差。
Over exploitation and environmental degradation have broken down the Bohai Sea ecosystem, and reduced its resilience and stability.
依据自然生态相似性引种原理和科学利用气候转暖升高的自然条件的观点，开展石楠在北京地区的引种和示范应用。
The introduction and demonstrated application of Photinia serrulata, a kind of evergreen broadleaf plant originating from the central and southern area of China, in Beijing parks are summarized.
依据自然生态相似性引种原理和科学利用气候转暖升高的自然条件的观点，开展石楠在北京地区的引种和示范应用。
The introduction and demonstrated application of Photinia serrulata, a kind of evergreen broadleaf plant originating from the central and southern area of China, in Beijing parks are summarized.
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