To hold back the particles or pollutants may exists in the cleaning medicament avoid them from entering into the membrane system.

截留来自清洗药剂中可能存在的颗粒或污染物，防止其进入膜系统。

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Both the tiles and the floor must be clean, dry and dust free. Clean off any grease, paint or pollutants. Prepare the bonding cement.

瓷砖和地板都必须清洁干净，干燥，无尘。清洁掉任何油脂，油漆或污染物。准备好粘合好的水泥。

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In the future, artificial skin could be studded with sensors that respond to chemicals, biological agents, temperature, humidity, radioactivity or pollutants.

在未来，人造皮肤将会被镶上针对化学、生物制剂、温度、适度、放射性、污染物等刺激的感知器。

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Burning it releases fewer pollutants than oil or coal.

VOA: special.2009.10.23

Corals 'bleach' when they are under stress, which typically has been caused by an increase in sea-surface temperatures (but which could be also brought on by variations in light, carbon dioxide (CO2) levels or pollutants).

CNN: All About: Coral Reefs

You could get very ill from bacterial contamination or other pollutants that often and easily end up in airplane food.

FORBES: Why You Should Avoid Airport Food And Bring Your Own

Consumers can reduce the amount of water through direct action - by applying a water-saving showerhead, shutting off the tap during teeth brushing, by not disposing of medicines, paints or other pollutants down the sink etc.

UNESCO: MEDIA SERVICES