单词：theory of human effectiveness
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High-Resolution Microscope Brings Tiny Worlds Closer to Researchers 高分辨率显微镜让研究员更好观察小世界 Modern microelectronic devices contain billions of components crammed into thumbnail-size flakes. The chemical industry uses na
VOA标准英语2015年(十月)
Most students are usually introduced to the study of history by way of a fat textbook and become quickly immersed in a vast sea of names, dates,events and statistics. The students' skills are then tested by examinations that require them to show how
128 The Zombie Project
We have historical records that allow us to know how the ancient Greeks dressed, 我们有历史纪录可循，可以让我们知道古希腊人如何穿着、 how they lived, how they fought, but how did they think? 如何生活、如何打仗，但他
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今天我们要学的词是untested。 Untested, 没有经过测试的，没有经过考验的。最近，香港和印度等亚洲地区陆续发现禽流感。为了预防禽流感对人类的威胁， Several human vaccines for bird flu have been d
英语每日一词
今天我们要学的词是untested。 Untested, 没有经过测试的，没有经过考验的。最近，香港和印度等亚洲地区陆续发现禽流感。为了预防禽流感对人类的威胁， Several human vaccines for bird flu have been d
英语单词荟萃
Do you think of yourself as a bit of an expert at board games like chess or Go? Maybe you're not quite as good as you think. New research from the University of Manchester and the University of Oxford suggests complex games like these are impossible
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