单词：placentograph
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Unit 3 Parks and places in china. [00:05.79]单元三 公园和安置在瓷器里。 [00:08.67]Point and say [00:10.20]指出并且说 [00:11.73]1 Tiananmen Sauare 2 YuGarden [00:15.56]1 天安门 2 禹花园 [00:19.38]3 West Lake 4 San Ya [00:22.87]
沪教版牛津小学英语五年级
Sunscreened Plants 遮光植物 A NASA researcher is finding that alfalfa plants grow more poorly when exposed to UVB -- ultraviolet B radiation from the sun. Learn more about sunscreened plants -- today on Earth and Sky. JB: This is Earth and Sky. Eart
(科普英语)Earth and Sky
It started with a simple experiment: take some graphite - the black stuff in the middle of a pencil - and put a piece of tape over it. When the scientists at the University of Manchester did that, they found that they could develop a material that co
VOA标准英语2010年(十)月
Graphene Called Amazing, Versatile Material of the Future 前景光明的多功能材料石墨烯 In 2004, two scientists at the University of Manchester in England isolated a carbon-based material called graphene, with some unusual properties. Andre
VOA标准英语2014年(二月)
BEIJING, Aug. 1 (Xinhua) -- The major part of China's armed forces, Chinese People's Liberation Army (PLA), has targeted on building up a defense might capable to handle threats in multidimensional battlefields. Celebrating the PLA's 82th founding a
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Volunteers equipped with nothing more than digital cameras are taking part in an unusual bee hunt. It's part of an environmental study that has amateur photographers documenting the impact of climate change, pollution and other factors on the interpl
VOA标准英语2010年(七)月