• 1. 净作用: self-purification
• 2. 自净作用: purification | self purification | self-purification of water body | automatic depuration
• 3. 生物自净作用: biological self-purification

更多释义

• 1.所以综合，物体受的所有力，车轮不会受到净力，但是有一个，净作用力，那就是我要推进的。
  And so the net, the sum of all forces on that object there is no net force on that wheel but there is a net torque, and that's why it's going to precess.
  dict.yoduao.com
• 2.在一个相关联的研究中，有作用的那组的核磁共振成像表明服用了退热净的人的大脑在感情痛觉区域同样活力减少了。
  In a related study, functional MRIs showed that people who had taken acetaminophen also had less activity in the brain regions that respond to emotional pain.
  dict.yoduao.com
• 3.人类仅利用了地球大约四分之一净初级生产资源（这是由植物组织光合作用所产生的）。 虽然这已经很多，但是还没有达到用尽的地步。
  Mankind appropriates about a quarter of what is known as the net primary production of the Earth (this is the plant tissue created by photosynthesis)—a lot, but hardly near the point of exhaustion.
  dict.yoduao.com

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