exposure的医药专业中文词条翻译 ... vacuum exposure frame 释义：真空曝光架 threshold exposure 释义：照射阈,曝光阈 allowable exposure 释义：容许照射 ...
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The EPA's threshold for safe exposure to PM 2.5 particles, as they're called, is 15 micrograms per cubic meter of air.
美国环保局的安全环境门槛是可吸入颗粒为PM 2.5，即每立方米空气中颗粒含量为15(译者：应该为25)微克。
with repeated exposure over time, you cross that threshold, and your body reacts.
但反复长时间暴露在这些过敏原中，你便超越了那个界限，身体便会有所反应。
Linear No Threshold (LNT) - the methodology to calculate risk from exposure to radioactive elements from the Fukushima Daiiachi disaster.
线性无阈(LNT) - - - - -计算暴来自福岛核放射性元素灾难风险的方法。
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