water self purification

基本解釋

Water environment impact is related to the style and strength of the activities and with the water areas self-purification ability.
旅游活動對水環(huán)境的影響除了與活動方式、活動強度有關(guān)外，與水域面積、自凈能力亦有顯著的關(guān)系。
Metabolism coupling of phytoplankton and microorganism is the basis of indicating culture water's self purification ability and keeping it stable.
養(yǎng)殖水體浮游植物和微生物的代謝偶聯(lián)，是反映水體自凈能力，保持水體穩(wěn)定的基礎(chǔ)。
The changing law of re-aeration is of great importance for predicting and evaluating the oxygen content in water and the self-purification process of organic pollutants.
水體復(fù)氧規(guī)律的研究對于預(yù)測和評價水中溶解氧含量，確定有機污染水體的自凈過程具有重要意義。

You had a group from Tennessee that had designed this water purification system that was self-generating through a water wheel.
WHITEHOUSE: Backyard Discussion on Women and the Economy