SSS 2009-08-21
时间：2018-12-24 作者：英语课 分类：Scientific American(八)月
The Great Pacific Garbage Patch may be disappearing, and not in a good way. New research presented at the biannual 1 meeting of the American Chemical Society reveals that polystyrene actually can break down in seawater.
Polystyrene is probably better known as Styrofoam, wads of which can be found on seashores and floating out to sea. Most scientists assumed it would linger forever but apparently 2, when exposed to sunlight and rain and seawater, Styrofoam breaks down into its constituents 3, most notably 4 three chemicals known to cause cancer.
Japanese chemists found traces of these chemicals in samples of seawater from across the Pacific.
They also found bisphenol A, or BPA, which is another chemical that leaches 5 from some plastics. BPA has been linked to human health impacts, such as heart disease, as well as developmental and reproductive disorders 6 in animals.
Of course, these chemicals are diluted 7 almost beyond detection by the vastness of the sea and not all plastics are exposed to strong sunlight or warm waters. But it’s clear that the millions of tons of plastic pollution building up in the world's oceans are up to no good.
- I have to make a biannual report next Monday.下周一我得作半年度报告。
- Our school doctor recommends a biannual visit to the dentist.我们校医建议一年去看牙医两次。
- An apparently blind alley leads suddenly into an open space.山穷水尽，豁然开朗。
- He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
- She has the full support of her constituents. 她得到本区选民的全力支持。
- Hydrogen and oxygen are the constituents of water. 氢和氧是水的主要成分。 来自《简明英汉词典》
- Many students were absent,notably the monitor.许多学生缺席，特别是连班长也没来。
- A notably short,silver-haired man,he plays basketball with his staff several times a week.他个子明显较为矮小，一头银发，每周都会和他的员工一起打几次篮球。
- People consume it when it leaches from plastic into baby formula, water or food in container. 当它被从塑料中经沥滤而入婴儿配方奶粉、水或罐装食品当中的时候，人们将其摄入。 来自互联网
- After this article uses is also the microwave pretreatment, leaches the method with the solution. 本文采用的也是微波预处理后用溶液浸取的方法。 来自互联网