Objectivel: Discusses the child essential element and the toxic element blood lead level relations.
目的：探讨儿童必需元素与毒性元素血铅水平的关系。
The environmental pollution caused by cadmium, a heavy metal toxic element, has aroused geologists' attention.
镉是重金属有毒元素，其环境污染一直是众多学者研究的焦点。
Toxic element, Pb, Cd and as, were higher in sepia than in squid ink by 121%, 127% and 319%, while Hg was similar.
乌贼墨中有毒微量元素铅、镉和砷的浓度分别比鱿鱼墨高121%、127%和319%，但汞的含量相近。
It may only be a matter of time before the toxic element also permeates deep aquifers in other Asian countries that follow the same practice, such as those around the Bengal Basin.
其他亚洲国家，例如孟加拉盆地附近的国家，以同样的方式使这种有毒物质渗透进深层含水层是迟早的事。
The Arsenic belongs to toxic semi-metal element.
砷是一种具有毒性的准金属元素。
Excavation and trace element analysis indicates: Jehol biota experienced mass mortality and rapid burial; toxic gases of the volcanic activities are the main factors of biological catastrophic event.
化石发掘和微量元素分析表明，热河生物群经历了集群死亡和快速掩埋，火山活动的有毒气体是生物灾难事件的主要因素。
A strong brittle gray toxic bivalent metallic element.
一种灰色有毒的二价金属元素坚韧易碎。
Cadmium is one of the most toxic heavy metals and is not an essential nutrient element for plant, animal and human being.
镉是动物和植物的非必需元素，也是毒性最大的重金属之一。
Nigerian food and drug regulators recently announced a death toll of 34 in an outbreak of fatalities among infants given a locally made baby formula tainted with a toxic thickening element.
日前，尼日利亚食品和药品监管部门发表声明，称该国生产的一种掺入有毒化学增稠剂的婴儿配方奶粉已造成34名婴儿死亡。
Nickel is an essential nutrition element to microorganism, but it is toxic at high concentration in soil.
虽然镍是一种必需的微量营养元素，但在较高含量时，对土壤微生物会造成毒害。
Thallium is a highly toxic metal element that plays not role in the metabolism of plants or animals.
铊是一种剧毒且对动植物的新陈代谢不起任何促进作用的金属元素。
Zinc is an essential nutrient element for biological organisms, but it is toxic to plant, animal and human at excess levels.
锌是生物必需微量元素，但过多时对动植物都有毒害。
Zinc is an essential nutrient element for biological organisms, but it is toxic to plant, animal and human at excess levels.
锌是生物必需微量元素，但过多时对动植物都有毒害。
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