duration of exposure

基本解释

When possible, communicate via text messaging rather than making a call , to limit the duration of exposure and the proximity to the body.
不紧急的事情尽量用短信联系，减少一通电话，也就减少了身体处在电磁场辐射中的时间，和电磁场靠近身体的机会。
Environmental factors such as duration of indoor pesticides use, duration of exposure to organic solvents and dietary factors played important role in female breast cancer in Tangshan area.
唐山地区女性乳腺癌危险因素中，室内杀虫剂使用、有机溶剂暴露、饮食因素等环境因素起着重要的作用。
The severity of carbon monoxide poisoning is a function of the duration of exposure and the concentration of the gas.
一氧化碳中毒的严重程度取决于一氧化碳的浓度和暴露时间。

Doses may be chronic or acute depending upon the duration of exposure.
FORBES: Infographic: How Much Radiation Could You Survive?