美国有线新闻 CNN 水中何种元素引发癌症?
时间：2018-12-20 作者：英语课 分类：CNN美国有线新闻2017年2月
Could an element commonly found in Americans` tap water caused cancer? A nonprofit environmental group is sounding the alarm about something called chromium-6. The U.S. government says high levels of it in the air can be carcinogenic, meaning they can cause cancer. But it`s not known yet if or how much chromium-6 in drinking water could be harmful.
一种常见于美国自来水中的元素引发癌症吗?一个非营利环保组织对此元素chromium-6敲响了警钟。美国政府表示空气中高浓度的此元素可导致癌症。但是，尚不清楚，在引用水中，chromium-6的致害浓度。
Still, the Environmental Working Group, an organization that says it`s dedicated 1 to protecting human health, found chromium-6 in almost 90 percent of the water systems at sample across the U.S. It`s bringing additional scrutiny 2 to the U.S. water supply following the recent discovery of high levels of lead in the water of Flint, Michigan.
环境工作组织，旨在保护人类健康。此组织发现，在美国收集的饮用水样本中，90%存在chromium-6。由于近期美国密歇根州弗林特市饮用水中铅含量超标，因此加美国供水系统加大了审查力度。
SUBTITLE 3: What is chromium-6?
chromium-6是什么?
Chromium-6 is a heavy metal and a carcinogen. It`s rarely found in nature. Instead, it`s created by various industrial processes.
chromium-6是一种重金属，同时也是一种致癌物质。自然界中很少存在，而主要于各种工业过程中产生。
SUBTITLE: It`s created by various industrial processes such as welding. And also used in many manufacturing processes, like tanning leather and producing stainless 4 steel.
字幕：它产生于焊接等各种工业过程。也用于许多生产过程,如鞣制皮革和生产不锈钢。
There are reports that chromium-6 is in the drinking water of hundreds of millions of Americans. However, health authorities don`t know exactly what level of chromium-6 might pose heath problems. They do know that when they put chromium in the drinking water of rats and mice, that that level of chromium caused cancer.
据报道，数百万美国公民的饮用水中，都存在chromium-6。但是官方尚不清楚，chromium-6对人类构成健康威胁的含量水平。也不知道何时在老鼠的饮用水中，添加了导致其癌症的chromium-6的含量。
Scientists who study chromium-6 say they`re concerned about even very low levels of exposure to chromium-6 when it`s a child or an infant or developing fetus 5.
研究chromium-6的科学家担心，即使chromium-6含量很低，也会影响儿童、婴儿或胎儿的健康发育。
- He dedicated his life to the cause of education.他献身于教育事业。
- His whole energies are dedicated to improve the design.他的全部精力都放在改进这项设计上了。
- His work looks all right,but it will not bear scrutiny.他的工作似乎很好，但是经不起仔细检查。
- Few wives in their forties can weather such a scrutiny.很少年过四十的妻子经得起这么仔细的观察。
- His new book has a subtitle.他的新书有一个副标题。
- Ah!I don't know why they don't subtitle these movies.唉！我不知道这些电影为什么不打字幕。