在《人类环境杂志》上发表的一项研究称，科学家们发现，自引进无铅汽油以来，美国东北部土壤中的铅含量已经显著下降。
In a study published in the journal Ambio, scientists found that lead levels in soil in the North-eastern United States had decreased markedly since the introduction of unleaded gasoline.
美国，马拉松：一个海豚研究中心的海豚在池子里游泳的时候等待喂食，他已经适应了这儿的新环境。
Marathon, US: a dolphin at the dolphin Research Centre waits to be fed fish while swimming in a pen, as he acclimates to his new surroundings after being found.
去年，美国牛肉生产商赞助的一项研究发现，在过去三十年，该行业对环境的影响有所下降。
Last year, a study supported by American beef producers found that their industry's environmental impact has decreased over the past thirty years.
但是，这些企业越来越多的把研究转移到了美国，那里的回报更丰富，环境也更具有激发性。
Increasingly, however, they are moving research to America because the rewards there are greater and the environment is more stimulating.
美国的一项研究也表明，如果学校提供孩子们优秀的自然环境，学校的学术水平也会上一新台阶。
US study suggested that when a school gave children access to a natural environment, academic levels were raised across the entire school.
美国的一项研究也表明，如果学校提供孩子们优秀的自然环境，学校的学术水平也会上一新台阶。
US study suggested that when a school gave children access to a natural environment academic levels were raised across the entire school.
美国俄亥俄州立大学的研究团队通过研究小鼠在不同生活环境中所受到的影响，提出了他们的理论。
The research team from Ohio State University came up with their theory by studying the effects of various living environments on mice.
更多工作需要去做，以研究其他环境污染——例如塑料添加剂双酚 A——可能同样也同样影响了美国激增的糖尿病发病率问题。
Much more work will need to be done to untangle how other environmental pollutants -- like the plastic additive bisphenol A -- may also contribute to America's ballooning diabetes problem.
研究表明，现已在美国广泛生产的玉米基生物乙醇，对比传统燃料而言，给环境和健康带来更大的负担。
The study shows that corn-based bioethanol, which is produced extensively in the US, has a higher combined environmental and health burden than conventional fuels.
碳品联合企业已经开始实施他们长达一年的咨询工作，而本月在美国大学环境变化研究院举行的会议中更是探讨了如何为泰斯科公司的产品增添碳质标签。
The Carbon Trust has begun a year-long consultation and this month a meeting took place at the Environmental Change Institute at Oxford University, which is looking into carbon labelling for Tesco.
她还说，在1999年她告诉她的研究结果后，美国环境保护局(EPA)取消了野外生物测试的许可。
She added that the U.S. Environmental Protection Agency EPA canceled its approval for field tests using the organism once she had told them about her research in 1999. CET-6, 2005.6.
美国环境中心的研究目的是确定有多少种在古龙水中用到的化学物质没有被列在标签上。
The EWG's study aimed to determine how many chemicals are used in colognes that are not listed on the label.
中国高校很多优秀学生认为全球竞争环境下美国研究生院是最好的选择。
Many top students from Chinese universities regard US graduate schools as the best choice in a globally competitive world.
莫里斯的研究之旅是英国国家环境研究委员会资助的，并有美国国家科学基金会的合作。
Morris' research trip is funded by Britain's National Environmental research Council and mounted with the U.S. National Science Foundation's cooperation.
“这要看水分流失的速率”，位于马萨诸塞的Natick的美国陆军环境医学研究所的Michael Sawka说。
"It depends on the rate of water loss," says Michael Sawka at the us Army Research Institute of Environmental Medicine in Natick, Massachusetts.
美国科学家日前在华盛顿举行的全国细胞生物协会的年会上宣布了一项最新研究成果。 他们发现，长期暴露在充斥着杀菌剂的环境中，可能会使脑部神经系统的发育受到损害。
The finding was described by Dr. Elias Aizenman on Sunday at the annual meeting of the American Society of Cell Biology in Washington, DC.
美国环境健康基金的摩根先生在重新检查了以前六项研究的数据之后发表了上述评论。
Mr Morgan, of the Environmental Health Trust, a U.S. campaign group, spoke out after re-examining the figures from six previous studies.
对一个孤僻、被溺爱的、专横且有些不适应环境的独生子女的刻板印象始于1896年，那时一位美国心理学家格兰弗.斯坦利Hall就这个主题作了一项研究报告。
The stereotype of a lonely, spoiled, bossy and maladjusted only child dates back to 1896, when an American psychologist named Granville Stanley Hall did a research paper on the subject.
这项研究表明，美国环境保护署(u.s. EPA)对其中114种污染物制定了最高法定安全标准，2004年到2009年期间，各大自来水公司92%的时间都达到标准。
U.S. EPA regulates 114 of those pollutants, setting maximum legal levels that water utilities achieved 92 percent of the time, according to the study.
德鲁•辛德尔是美国航天局戈达德太空研究所的气候学家，他研究了人类活动排放的废气对地球大气环境的影响。
Drew Shindell is a climate scientist with the NASA Goddard Institute for Space Studies.
美国研究人员发现甜点在嘈杂的飞机上并不美味，在嘈杂的环境下即使是开胃类食物的口感也感觉有些重。
American researchers have discovered that deserts don't taste as sweet on board a noisy airplane, while the taste of savoury food is intensified in the loud environment.
很多身处美国之外的人们依旧认为美国充满机会，而研究显示，即使在当前严峻的经济环境下，很多美国的年轻人也赞同这种观点。
Many outside the US continue to see the country as one of opportunity, and despite being in a tough economic position, research shows many young Americans would agree.
被研究的这些双胞胎都生活在美国，成长的自然环境几乎相同，并且具有几乎相同的营养历史。
The twins who were the subjects of these studies lived in America, were raised in much the same physical environments, and experienced much the same nutritional histories.
被研究的这些双胞胎都生活在美国，成长的自然环境几乎相同，并且具有几乎相同的营养历史。
The twins who were the subjects of these studies lived in America, were raised in much the same physical environments, and experienced much the same nutritional histories.
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