Exposure to over 100 millisieverts a year is a level which can lead to cancer, according to the World Nuclear Association.
据世界核协会称，暴露在超过100毫希的核辐射中1年就会致癌。
OBJECTIVE:To explore the effect of low level lead exposure during pregnancy on the auditory developmental level of infants through examination of auditory brainstem response.
目的：通过听脑干反应检查观察孕期低水平铅暴露对婴儿期听力发育的影响。
Objective:To observe the effect of long term exposure to low level of lead on cellular immune function in mice.
目的：观察长期低铅暴露对小鼠细胞免疫功能的影响。
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