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。
The experiments in mice showed that the drugs could reduce by about five decibels the permanent threshold shift that can occur after noise exposure.
这项在老鼠身上的实验显示这些药物在噪声暴露之后能够将永久性听阈位移降低五个分贝。
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