Cohb can be considered as an indicator of co exposure.

一氧化碳血红蛋白可以看做一氧化碳暴露的指示值。

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Although the causality of the effects of low concentrations of SO2 is still uncertain, reducing SO2 concentrations is likely to decrease exposure to co-pollutants.

尽管二氧化硫低浓度效应的因果关系尚不确定，但是，降低二氧化硫浓度很可能减少对混合污染物的暴露。

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Also, research has suggested that nicotine may be a co-promoter in generating lung cancer, so continual exposure to nicotine might work against chemotherapy treatments, Edelman said.

研究同样表明尼古丁也是患上肺癌的共同推动者，所以继续吸烟对化疗不利，Edelaman说。

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The plant's operator Tokyo Electric Power Co (Tepco) said exposure to radiation levels in the No 3 reactor for four-and-a-half hours would exceed the emergency safety limit for power plant workers.

BBC: Robots record high radiation levels at Japan reactors

Ask if there are any projects you can contribute to or if there is any extra work you can take on, giving you exposure to other managers and co-workers.

WSJ: Make a Second Job Work for You

Workers at the plant have received considerably higher levels of exposure, according to data from Tokyo Electric Power Co.

WSJ: In Japan, Relief at Radiation's Low Toll