氧元素在自然界的循环状态。动植物的呼吸作用及人类活动中的燃烧都需要消耗氧气,产生二氧化碳。但植物的光合作用却大量吸收二氧化碳,释放氧气,如此构成了生物圈的氧循环(氧循环和碳循环是相互联系的).。氧在各圈层中的浓度如下(括号内数字为元素的丰度次序): 地球整体:28.5%(2) 地壳:46.6%(1)海洋:总量85.8%(1)溶解氧量,15℃时为6mg/kg(13) 大气:23.2%(2)。
碳氮氧循环 CNO cycle ; [天物] carbon-nitrogen-oxygen cycle ; CNO cycle, carbon-nitrogen-oxygen cycle
臭氧循环 ozone cycle
液氧循环量 [机] liquid oxygen circulation
增强式有氧循环 Plyometric Cardio Circuit
铁淦氧循环器 ferrite circulator ; circulator ; ferrite
硅氧循环 silica cycle
富氧循环燃烧技术 OXY-Fuel Combustion
氦氧循环通气装置 heliox-recirculating respirator
氧循环原理图 Gas Recombination
另外,世界森林是天气循环和碳-氧循环的一个重要组成部分。
Additionally, the forests of the world are a critical part of the weather cycle as well as the carbon-oxygen cycle.
海洋的浮游生物即构成了食物链底端,又是我们地球碳-氧循环的交换场。
The ocean's planktons form the bottom of both the food chain and the bulk of the carbon-oxygen cycle for our planet.
主要是利用正极产生氧气可在负极吸收达到氧循环,可防止水分减少。
The main is to use the positive electrode to produce oxygen can be absorbed in the negative oxygen cycle, can prevent water reduction.
The red blood cells that carry oxygen only live within your circulation for about a month and so you have to continually be replacing cells that are dying and so there are cells that are proliferating.
携带氧的红细胞,在你的循环系统中的寿命只有一个月,因此你必须持续不断地更新衰老的细胞,所以就有在增殖的细胞
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