他们还发现，长期食用硒可能会产生毒性效应。
And taking selenium over a long period of time could have toxic effects, they found.
食物添加剂和防腐剂长期食用却可产生累积毒性效应。
Food additives and preservatives may have a long-term cumulative toxic effect.
目的确定香烟主流烟雾与侧流烟雾对小鼠的遗传毒性效应及两者遗传毒性的差别。
Objective to find out the genotoxicity of main stream and side stream of the cigarette.
目的确定香烟主流烟雾与侧流烟雾对小鼠的遗传毒性效应及两者遗传毒性的差别。
Objective to find out the genotoxicity of main stream and side stream of the cigarette.
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