No matter what level of exposure of smoke you have, your lung cells know it and they are responding.

无论你暴露在何种程度的烟雾环境中，你的肺部细胞都知道并且会做出反应。

youdao

Really, the safe level of exposure is no exposure.

吸烟真正的安全水平就是一点儿都不吸。

youdao

There is no safe level of exposure to second-hand tobacco smoke.

关于二手烟草烟雾，不存在安全接触水平。

youdao

But clearly there is no such thing as a safe level of cigarette smoke exposure.

VOA: special.2009.06.03

You have to limit your exposure to risky asset classes to a level that allows you to sustain those positions even in the face of terribly adverse market conditions.

你必须把手中持有的风险资产,限制在一个合适的比例水平,并且即使到了最差的市场环境下,你依旧能够承受这些风险资产

耶鲁公开课 - 金融市场课程节选

"The people that are at the highest level of passive smoke are actually the ones reporting exposure in their own homes.

VOA: standard.2010.06.15

The two funds had a high level of exposure to bonds backed by subprime mortgages.

NPR: Bear Stearns Hedge Fund Managers Charged

Everything that they have spent years and years building now has a different level of exposure.

FORBES: Executive Profiles: Disruptive Tech Leaders In Social Business -- Randy Guard, SAS Institute

The European Union says no safe level of exposure has yet been identified.

BBC: News Online