Question

帮我翻译一段话，谢谢

Are the urban soils of Guangzhou polluted?
In a review of heavy metal pollution of soils in china,chen et al.(1999) suggested that“Heavy-metal soil polltion is defined as the phenomena where the heavy-metal content in soils exceeds natural background levels and causes ecological destruction and deterioration of environmental quality”
Table 6 compares the Guangzhou date with some background date and also some critical and trigger limits derived from the Netherlands and U.K. It can be seen from Table 6 that all top soil heavy metals，with the exception of Ni in the Park，are above the average value for Guangdong province. They also，again with the exception on Ni in the park,exceed the values for samples from Hainan Island,which affords a“clean”baseline data sea for the region. what is also of interest is that if the rations of heavy metal content for roadside sites in Guangzhou are compared to the Hainan data in from of a ratio then ratios of 3.09，1.04，4.16，1.84 and 1.59 are obtained for Cu，Ni，Zi，Pb and Cu respectively. With the exception of the 4.16 for Zn they are not dissimilar to rations of roadside to park top soil reported previously for Guangzhou. This suggests that the roadside to park comparison for soils in Guangzhou may pick up enhancement of heavy metals associated with vehicular traffic.

Answer 1

广州市区土地是否遭受污染
在陈和其它人于1999年共同完成的对重金属土壤污染的报告中指出，重金属土壤污染指重金属在土壤中的含量超过了自然状态下的含量水平，并且造成生态破坏，造成环境恶化的现象。
六国集团对广州的数据与一些参照数据以及从荷兰、英国等地得出的临界点数据进行了对比，由此得出，除土壤中的镍金属含量之外，广州其它地区土壤中的重金属含量超过广东省以及海南岛样品土壤的平均水平，而海南岛土壤中的重金属含量则为保持该地区海区洁净的基点数据。有意思的是，广受地区沿路土壤中的铜、镍、锌、铅的含量与海南的土壤数据相比，比率分别为：3.09，1.04，4.16，1.84 和 1.59，而这些数据正好与广州地区沿路土壤中以上元素的含量与公园地区表层土壤含量的比率相似（锌元素含量除外）。这就说明，广州土壤中的重金属含量较高与该地区交通状况相关。

ps:对于内容的翻译还是比较有把握的，但是尚有两处处原文的内容不够清楚：第二段第五行中的SEA出现的莫名其妙，如果原文中有的话，那么实显得突兀，如果没有的话，那么翻译中的“海洋”一词可以去掉。另外第七行中Hainan data之后的“from”一词，是否原文中应该为“form”这样比较说的通。水平有限，见笑