You said that the nitrogen cycle is also an important nutrient cycle.
你说了，氮循环也是一个重要的营养循环。
When nutrients are used over and over in the environment, we call that a nutrient cycle.
当营养物质在环境中被反复使用时，我们称之为营养循环。
Rainfall is a key factor affecting soil erosion and nutrient cycle by runoff in low hilly red soil area.
降雨是影响低丘红壤坡地土壤侵蚀和养分随径流迁移的一个关键因子。
Litter decomposition is a key process of nutrient cycle and energy flow in ecosystems, while soil microorganism and soil fauna are the main executants of litter decomposition.
凋落物分解是生态系统物质循环和能量流动的重要环节，而土壤生物是凋落物分解的主要完成者。
In recent 10~20 years, the discovery of prochlorophyte and microbial food web has revealed the significance of nano\|plankton in nutrient cycle and energy flow of aquatic ecosystem.
最近一二十年来，原绿藻和微食物网的重大发现已使人们充分认识到微型浮游生物在水域生态系统的养分循环和能量流动中的重要意义，也为微型浮游生物的研究提出了新的方向。
As the two branches of Grampositive bacteria, Firmicutes and Actinobacteria mostly participated in decomposition of detritus and heterotrophic nutrient cycle in the seaweed beds of Gouqi Island.
厚壁菌门和放线菌门作为革兰氏阳性菌的两个分支，在枸杞岛海藻场中主要参与分解碎屑及异养营养素的循环过程。
The Phosphorus cycle has been studied a lot by ecologists because like I said, Phosphorus is an important nutrient and it's not so abundant.
生态学家对磷循环进行了大量研究，因为如我所说，磷是一种重要而不充足的营养物质。
The three most important nutrient recycles are the nitrogen cycle, the carbon cycle and the one we are going to talk about today, the Phosphorus cycle.
这三种最重要的营养循环包括氮循环、碳循环和我们今天要讲的磷循环。
The reproductive cycle of marine bivalves is closely related to cycles of nutrient storage and use and to environmental factors such as water temperature and food availability.
海洋贝类的繁殖周期与营养物质储存、利用和环境因子（如海水温度、食物可得性、盐度等）密切相关。
The reproductive cycle of marine bivalves is closely related to cycles of nutrient storage and use and to environmental factors such as water temperature and food availability.
海洋贝类的繁殖周期与营养物质储存、利用和环境因子（如海水温度、食物可得性、盐度等）密切相关。
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