翻译 重金属含量In 2003．48 per cent of the world’s population isestimated to live in urban areas with the proportionthat is urban projected to rise to 61 per cent by 2030fUnited Nations．2004)． Moreover．during 2000203 0 the world’s u

翻译 重金属含量In 2003．48 per cent of the world’s population isestimated to live in urban areas with the proportionthat is urban projected to rise to 61 per cent by 2030fUnited Nations．2004)． Moreover．during 2000203 0 the world’s u
翻译 重金属含量
In 2003．48 per cent of the world’s population is
estimated to live in urban areas with the proportion
that is urban projected to rise to 61 per cent by 2030
fUnited Nations．2004)． Moreover．during 2000
203 0 the world’s urban population is projected to grow
at an annual average rate Of 1．8 per cent．around
double that projected for the total world population
(United Nations,2004)．Consequently knowledge of
environmental conditions,including soils,within the
urban environment is of increasing importance in
terms of human health fImperato et a1．,2003：De
Kimpe and Morel,2000)．Heavy metals are some of
the most common pollutants in urban areas due to
vehicles．industry．waste disposal and other human
activities．Chen et a1． f l 9991 observe that “Soil
pollution by heavy metals is both serious and
widespread in China”．and that the main sources of
heavy metal pollution are irrigation． solid．waste
disposal.pesticide and fertilizer application and
atmospheric deposition． Heavy metal pollution．
especially Pb,of urban soils and plants have been
widely reported in the last 20 years (Ellis and Revitt.
1 982；Albasel and Cottenie．1 985；Tam et a1．．1 987；
Nicholas．Hewitt and Candy．1990；Chen et a1． l997a；
W ilcke et a1．．1 998；Pichtel et ．．1 997,Lu et a1．.
2003)．However,very few studies have been ca~ied
out in Guan~zhou and the Pear1 River Delta．which are
areas of rapid economic development in China over
山e last 20 years．Given that China’s urban population
increased 6．6 times during 1 950- 2000 fUnited
Nations,2004),the increasingly urbanized nature of
the population in the Guangdong Provinee and the
Pearl River Delta region fLin, l 997)also adds
importance to evaluating heavy metal distribution in
urban areas．

翻译 重金属含量In 2003．48 per cent of the world’s population isestimated to live in urban areas with the proportionthat is urban projected to rise to 61 per cent by 2030fUnited Nations．2004)． Moreover．during 2000203 0 the world’s u
用翻译器翻译的,因为看你很急,有些东西没有翻译出来你应该懂?!
在占世界人口的百分之2003.48
据估计,生活在城市地区的比例
这是城市,到2030年预计将上升到百分之61
fUnited Nations.2004）.Moreover.during 2000
203 0世界城市人口预计将增长
以年均1.8平均每cent.around
一倍,占世界总人口的预测
（联合国,2004）.因此知识
环境条件,包括土壤,在
城市环境是越来越重要的
人类健康fImperato格A1等方面.2003年：德
Kimpe和莫雷尔,2000年）.重金属是一些
在城市地区最常见的污染物因
vehicles.industry.waste处置和其他人类
activities.Chen等一览表.佛罗里达州9991观察到,“土壤
重金属污染严重,既
广泛分布于中国.“,而主要来源
重金属污染的灌溉.solid.waste
处置.农药和化肥的应用和
大气沉降.重金属污染.
尤其是铅,城市土壤和植物已
广泛报道,在过去20年（Ellis和Revitt.
1 982; Albasel和Cottenie.1 985;潭等格A1 ..1 987;
Nicholas.Hewitt和Candy.1990;陈等一览表.l997a;
W ilcke等格A1 ..1 998; Pichtel等..1 997路等一览表..
2003年）.然而,很少有研究已经十分〜灭蝇灯
在关〜周和Pear1河Delta.which是
在中国经济快速发展地区的可
山é 20 years.Given是中国的城市人口
增长6.6倍在1 950 - 2000 fUnited
联合国,2004）,日益城市化的本质
在广东Provinee和人口
珠江三角洲地区fLin,升997）也增加了
重视评估重金属分布
城市地区.