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The toxic level of retinol is about 500 times the minimum requirement. 视黄醇的中毒水平为最低需要量的500倍。
The toxic level of retinol is about 500 times the minimum requirement . 视黄醇的中毒水平为最低需要量的500倍。
When molybdenum is deficient, nitrate may accumulate to a toxic level in the plant. 当钼不足时，硝酸盐会积累在植物中达到毒害的程度。
When the liver reaches a dangerous toxic level, it will attempt to eliminate the toxins through abnormal channels called vicarious elimination. 内分泌系统是人体其中一个很重要的排毒渠道，当人体肝脏中毒过深时，便会透过内分泌系统来排除毒素，以免肝脏中毒过深。
Lead is an accumulative poison and will collect in the body over a period of years, even decades, before noticeable symptoms occur or a toxic level is reached. 铅是一种累积性的毒物，它会在体内积存为期数年乃至数十年，随后才出现明显症状，或者说达到中毒的程度。
America has "toxic levels of inauthenticity," Gilmore and Pine argue: most of the e-mail we get is fake. 美国的真实性已经到了中毒的地步，Gilmore and Pine认为：我们收到的大部分电子邮件都是垃圾。
He cites an experiment in which Lengauer and his colleagues exposed human cell lines to toxic levels of a carcinogen in broiled meat.Only a few cells developed resistance and survived. 布列维克引用了蓝高尔及同事的一项实验为证，该实验将人类的细胞株接触烤肉中的致癌物质，其剂量达到有毒的程度，结果只有少数细胞产生抵抗力而存活下来。
The factory had been sending out toxic fumes. 这家工厂一直在排放有毒的废气。
I'd like a room on the upper level. 我想要楼上的房间。
We need a mechanical digger to level the ground. 我们需要一台挖掘机来平整土地。
Beware how you handle the toxic chemical. 小心处理有毒的化学药品。
I hope you'll be on the level with me. 我希望你对我坦率布公。
She needs to win this point to level the score. 她要赢得这一分才能将比分扳平。
Keep a level head and phone the Fire Department. 保持冷静，打电话给消防署。
A toxic chemical or other substance. 有毒的化学品或其它物质
A football field should be level. 足球场地应该平坦。
The rising level of crime is a sign of the times. 犯罪率增高是这一时代的特徵。
The degree to which a substance is toxic. 毒效一种物质毒性所达到的程度
Concentrations of deicer and anti-icer components previously observed in airport effluents have, at times, exceeded the toxicity levels shown in results of this study. 在报告的结果中，相同浓度的去冰剂和抗冰剂分子的毒性程度，有时高于以往在机场排放物观察到的化合物。
I have told the whole story on the level. 我已经诚实地把整个事情经过讲出来了。