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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This is not 100% the case, of course, as there are genetic factors as well as exposure to radiation or pollutants that create an overwhelming number of cell mutations and depress the immune system.

不过，当然不是100%都是这样，因为还有遗传因素和暴露在辐射或污染之下导致压倒性数量的细胞突变并抑制免疫系统。

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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