美国科学家称，每个办公室都可以使用便携式踏板机来改善员工的健康状况。
Portable pedal machines could be used in every office to improve the health of workers, according to scientists in the US.
美国科学家称，覆盖北冰洋的冰面去年冬天继续缩减。
American scientists say ice covering the Arctic Sea continued to shrink last winter.
美国科学家称通过克隆技术创造了人类胚胎。
Scientists in the United States say they've created a human embryo through cloning.
美国科学家称，他们已经发现导致慢性疲劳症的重大突破。
US scientists say they have made a potential breakthrough in understanding what causes the condition known as chronic fatigue syndrome (CFS) or ME.
美国科学家称，一天喝五杯咖啡或可缓解阿尔茨海默病的记忆问题。
Drinking five cups of coffee a day could reverse memory problems seen in Alzheimer's disease, US scientists say.
美国科学家称核桃是所有坚果中最为健康的一种，应该作为健康饮食的一部分多吃。
Walnuts are the healthiest of all the nuts and should be eaten more as part of a healthy diet, US scientists say.
据科学家称，美国科罗拉多州西部的一处发掘现场揭示了整个冰河时代的生态系统。
Scientists say an excavation site in western Colorado is revealing an entire Ice Age ecosystem.
美国科罗拉多大学的研究小组称，科学家发现的湖泊距今已有34亿年历史，占地80平方英里，深达1500英尺。
The lake, which dates back some 3.4 billion years, appears to have covered as much as 80 square miles and was up to 1, 500 feet deep, said the team from the University of Colorado.
美国科罗拉多大学的研究小组称，科学家发现的湖泊距今已有34亿年历史，占地80平方英里，深达1500英尺。
The lake, which dates back some 3.4 billion years, appears to have covered as much as 80 square miles and was up to 1,500 feet deep, said the team from the University of Colorado.
美国科学家警告称，为了确保未来的葡萄酒制造，必须研发新的葡萄品种。
Scientists in the United States have warned that new varieties of grape need to be developed to secure the future of wine-making.
美国科学家近日称，改善饮食习惯、增加运动量能使人体的基因活动迅速剧变。
Comprehensive lifestyle changes including a better diet and more exercise can lead to swift and dramatic changes at eh genetic level, US scientists said recently.
韩国和美国科学家报告称，他们已通过克隆创造出人类胚胎，并从中提取出胚胎干细胞。胚胎干细胞是在医学研究方面具有广阔前景的普适细胞。
Scientists in South Korea and America report that they have created human embryos through cloning and extracted embryonic stem cells, the universal cells that hold great promise for medical research.
美国科学家近日研究称，造成这种现象的原因可能在于这些物种的免疫系统信号方式以及特殊免疫调节分子产量的不同。
S. scientists said recent research, the reasons for this phenomenon may lie in these species signal the immune system and way of special immune regulation yield of different elements.
美国科学家近日研究称，造成这种现象的原因可能在于这些物种的免疫系统信号方式以及特殊免疫调节分子产量的不同。
S. scientists said recent research, the reasons for this phenomenon may lie in these species signal the immune system and way of special immune regulation yield of different elements.
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