设置曝气装置，增加水体的含氧量，促进有益细菌及其他微生物的活动，增强其对污染物的吸附、氧化、分解和还原的作用。
Set device for exposure to increase the oxygen content in water and the activity of beneficial microorganisms, as well as their action of absorbing, oxidizing, decomposing and reducing pollutants.
随着人类航天活动的日益增强，空间目标数量日益增多，空间碎片是人类航天活动遗弃在空间的废弃物，是空间环境的主要污染物。
The quantities of space debris are increased day by day with the human space activities increasing. Space debris are castoff abandoned by human space activities, they are the dominating pollutant.
随着人类航天活动的日益增强，空间目标数量日益增多，空间碎片是人类航天活动遗弃在空间的废弃物，是空间环境的主要污染物。
The quantities of space debris are increased day by day with the human space activities increasing. Space debris are castoff abandoned by human space activities, they are the dominating pollutant.
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