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- One is the understanding of biogeochemical cycles of closed systems. 其一是对闭合系统的生物地球化学循环的理解。
- The processing of wetland changes influenced wetland and other ecosystem in biodiversity, primary productivity, and global biogeochemistry cycle, as well as greenhouse gas contents in the atmosphere. 至今，人类已把天然的湿地景观格局改变为受人类支配的土地利用格局。
- Phosphine (PH3) is a kind of extremely toxic, highly active, reductive gas, produced by the reduction of P biogeochemistry cycle, and has been proved to be trace gas existing stably in the atmosphere. 摘要磷化氢(PH3)是一种剧毒、十分活泼的还原性气体，是磷生物地球化学循环的还原产物，已被证实是大气中稳定存在的痕量气体。
- Wetlands have unique biogeochemical cycles with many chemical transformations and chemical transport processes that are not shared by many other ecosystems. 摘要湿地有其独特的生物地球化学循环，其间许多化学迁移和转化过程不为其它生态系统所共享。
- The course covers productivity and biogeochemical cycles in ecosystems, trophic dynamics, community structure and stability, competition and predation, evolution and natural selection, population growth and physiological ecology. 课程包含生态系之生产力与生物地质化学循环、营养动力学、群落结构与稳定性、竞争与捕食、演化与天择、族群成长，及生理生态学。
- The present paper reviews biogeochemical cycle of nitrogen in agroecosystem. 根据国外资料,综述了有机农业土壤氮素流失规律与防止措施。
- In addition, its role in biogeochemical cycling is equally significant. 此外，它在生物地球化学循环方面也具有同样的重要作用。
- biogeochemistry cycles 生物地球化学循环
- This text summarizes the current status of and advances in nitrogen biogeochemical cycling and the possible problems. 文章全面综述了氮素生物地球化学过程研究的现状与进展及其可能存在的问题。
- The machine cycles automatically. 这台机器自动循环运转。
- Mason R P，Fitzgerald W F，Moral MM.The biogeochemical cycling of element mercury:anthropogenic influences [J]. 黄永键，周蓉生，张成江，等.;大气环境中汞污染的研究进展[J]
- Finally, the biogeochemical cycling model of organic related particles is put forward. 并提出了河口有机性颗粒的生物地球化学循环模式。
- The advances in the studies of methyl chloride biogeochemical cycling are reviewed. 摘要对氯甲烷的海洋生物地球化学循环的研究进展进行述评。
- Ecosystem element balance has been a main focus of global change ecology and biogeochemical cycle research. 摘要生态系统元素平衡是当前全球变化生态学和生物地球化学循环的研究热点和焦点。
- There are four major processes in biogeochemical cycling: nitrification fixation;organic nitrogen ammonification;nitrification, and denitrification. 这一地区氮的生物地球化学循环包括:生物固氮、有机氮的氨化、氮的硝化、反硝化等4个主要过程。
- Knowledge about biogeochemical cycle and environmental effect of antimony are summarized, and the scientific problems are analyzed. 为了揭示锑的全球性污染程度、循环过程及其对生态环境的影响，急需开展深入研究。
- This machine cycles automatically. 这台机器自动循环运动。
- Now, more and more scientists pay their attention to the effects of dam reservoirs on the biogeochemical cycle of riverine nutrients and succedent aquatic ecological problems. 最近,水坝拦截对河流生源要素生物地球化学循环的影响及其引起的相关水环境生态问题引起越来越多的科学家们的关注。
- A tree is a connected graph with no cycles. 一个树是一个没有圈的连通图。
- Because of the special physiological and ecological characteristics, Synechococcus spp. plays an important roles in global climate changes and biogeochemical cycling. 摘要聚球蓝细菌因其特殊的生理生态特点，决定了其在全球气候调节、生物地球化学循环中重要地位。
