THEY were locked away in an old ammunition bunker near St Louis, in dozens of cardboard boxes. Each was in its own manilla envelope, with an index card identifying the donor. These 85,000 baby teeth were collected in the late 1950s and early 1960s from children in the St Louis area to study the fects of radioactive fallout in the environment.(引子~)

　　The fallout came from hundreds of above-ground nuclear tests in America and other parts of the world. The radioactive isotope Strontium-90, one of the by-products of the bombs, spread into the atmosphere, fell onto the land, was ingested by dairy cows and passed into the milk supply. Strontium-90, like calcium, was concentrated in children’s teeth in detectable amounts. In 1958 scientists in St Louis began a campagin(campaign) to collect baby teeth to study the link between above-ground testing and human exposure. The undisputed(扩充词汇~) link between the tests and a radioactive element in baby teeth provided much of the impetus(impetus) for the 1963 Test Ban Treaty, which outlawed above-ground nuclear weapons-testing.(具体讲如何有link)

　　The rediscovery of the 85,000 samples, about a quarter of the total collected(描述数据时很好用的插入语~), has spurred(spur) a new fort to study the link between early childhood exposure and health problems in later life(虽然简单，我咋就不会使呐). There is already some evidence that 1950s children in St Louis grew into adults with a higher-than-average rate of cancer(这个句式不错~). Now researchers at the Radiation and Public Health Project, based in Brooklyn, are attempting to find more than 6,000 of the teeth donors to track their health problems or, in some cases, their premature deaths. (这种link的危害及追踪调查)

　　The link between radioactive fallout and subsequent health problems is an international issue. British ex-servicemen(退伍军人) exposed to radiation in bomb tests in the south Pacific in the 1950s recently sought compensation in a London court for cancer, infertility and other medical problems. The British government’s position in the case is that, even if there is a link, too much time has passed to make a claim. In this, at least, the British and American brass(在这里应该是高级官员的意思) still think as one.(上升到international上，并说明现在就此问题的国际态度，引人深思)

　　偶发现这个引子真是很好，可以引起读者兴趣，嗯嗯，AW时再想想看哪天也来个~

　　这篇比较简单啦(绝对不是故意滴~)

　　做素材的话可能可以用到科技发展与人类生存问题方面

　　摹写：

　　1、There is already some evidence that plenty of countries has grew into developed ones with terribly environmental pollution

　　2、The court’s position in the case is that, even if there’s miscarriage of justice, too much time has passed to make a claim

更多出国留学最新动态，敬请关注澳际教育手机端网站，并可拨打咨询热线：400-601-0022