在《人类环境杂志》上发表的一项研究称，科学家们发现，自引进无铅汽油以来，美国东北部土壤中的铅含量已经显著下降。
In a study published in the journal Ambio, scientists found that lead levels in soil in the North-eastern United States had decreased markedly since the introduction of unleaded gasoline.
减少空气中铅含量对人类健康有何益处？
What are the benefits to human health of reducing the levels of lead in the atmosphere?
目前没有已知的人体铅含量安全水平的数据。
工厂对工人验血，辞掉那些血铅含量超标的人。
The factory conducted blood tests and dismissed those whose lead levels were elevated.
那所旧房子的涂料含有危险的铅含量。
The paint in that old house contains a dangerous amount of lead.
监测血液、脑、股骨铅含量。
工业区和废料堆附近的铅含量尤为之高。
And lead amounts can be especially high near industrial areas and waste dumps.
我们的饮用水中的铅含量高得难以接受。
The percentage of lead in our drinking water is unacceptably high.
铅含量很高时可能会致命。
方法采用非火焰原子吸收法测定全血铅含量。
Methods Non flame atom absorptance was used to determine the blood lead levels.
建立一种以直接火焰原子吸收法测定高盐食品铅含量的方法。
To search a method to determine lead in high salt food with direct flame atomic absorption.
目的观察血铅和尿铅含量与急性四乙基铅中毒程度之间的关系。
To observe the relationship between lead content in blood and urine and acute tetraethyl lead poisoning.
相比之下，美国只有不足1%的儿童，其血铅含量超过WHO限制值。
By comparison, fewer than 1% of children in the U.S. have levels above the WHO limit.
结果从驱铅开始至结束，驱铅实验组尿铅含量明显高于阳性对照组；
Result Urine level of lead was significantly higher in rats with natural plant preparation than in control rats.
对浙江主要产茶区茶叶原料铅含量进行了调查研究，其状况不容乐观。
The Lead content in tea leaves from main tea producing areas of Zhejiang Province and its affecting factors have been investigated.
结果表明沉积物中铅含量近年来有所下降，镉和锌含量明显高于背景值。
The content of lead has decreased in recent years while cadmium and zinc are relatively high.
研究表明，血铅含量略高于这一水准都会导致永久性的神经损伤与智商下降。
Studies show even slightly elevated lead levels can lead to permanent neurological damage and reduced IQ.
血液中铅含量较高的儿童在智商测试、数字技能和阅读能力等方面表现欠佳。
Children with higher blood lead levels did less well in IQ tests, number skills and reading ability.
利用氢化物发生-原子荧光光谱法（HG-AFS）测定浆层纸中的铅含量。
The content of lead in coated paper was determined by hydride-generation atomic fluorescence spectrometry(HG-AFS).
结果：新生儿脐血铅含量与神经行为总分及行为能力评分间存在负相关关系。
Results revealed that there was a negative relationship between neonatal umbilical blood lead level and their neurobehavioral score and behavioral ability.
这种对无铅燃料的要求相应也显著地减少了大气中的铅含量(和其他金属附加物)。
This lead-free fuel requirement, in turn, significantly reduces the amount of lead (and other metal additives) in the atmosphere.
今年前段时间浙江德清县，当地的332居民血液铅含量超标，其中53人转入医院。
In Zhejiang's Deqing county 53 people were hospitalised following tests earlier in the year which found high levels of lead in the blood of 332 residents.
新的研究暗示了血液中的铅含量可以用来解释为什么50多岁的女性易受高血压的攻击。
New research suggests that lead in the bloodstream might help explain the onset of high blood pressure in women in their 50s.
本文报导复合型豆腐凝固剂用于制造豆腐，对凝固剂进行铅含量测定的实验原理和操作方法。
This paper describes the compound type of bean card coagulant applied to make bean curd, experimental principle and operating method for the determination of lead content in coagulant.
本文报导复合型豆腐凝固剂用于制造豆腐，对凝固剂进行铅含量测定的实验原理和操作方法。
This paper describes the compound type of bean card coagulant applied to make bean curd, experimental principle and operating method for the determination of lead content in coagulant.
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