VOA常速英语2008年-Traces of Drugs Found in US Drinking Water

By Carol Pearson
Washington
11 March 2008
 

An Associated Press survey shows much of the drinking water in major American cities contains traces of prescription¹ drugs.  The news service reports that researchers are unsure of the risk to humans from decades of persistent², random³ exposure to low levels of drugs.  But a U.S. environmental official tells the AP it is "a growing concern.:"  More from VOA's Carol Pearson.

1 prescription   

n.处方，开药；指示，规定

参考例句：

• The physician made a prescription against sea- sickness for him.医生给他开了个治晕船的药方。
• The drug is available on prescription only.这种药只能凭处方购买。

2 persistent   

adj.坚持不懈的，执意的；持续的

参考例句：

• Albert had a persistent headache that lasted for three days.艾伯特连续头痛了三天。
• She felt embarrassed by his persistent attentions.他不时地向她大献殷勤，使她很难为情。

3 random   

adj.随机的；任意的；n.偶然的(或随便的)行动

参考例句：

• The list is arranged in a random order.名单排列不分先后。
• On random inspection the meat was found to be bad.经抽查，发现肉变质了。