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material scientists admire spider silk for being lightweight and strong.now another arthropod product is getting into the act insect cuticle,the tough flexible material is inside insect skeleton.researchers at harvard * institute for biological inspi
Scientific American(十二)月
图片1 enemy n. 敌人，敌军 adj. 敌人的，敌方的 例句：After several fails the enemy was forced to retreat. 几经失败之后，敌军被迫后撤。 rival n. 竞争者 对手 v. 竞争，对抗 ，相匹敌 例句：After the national
漫画搞定六级词汇（文本+音频）
By Ted Landphair Washington 09 August 2007 Every day, American consumers are offered a simple choice when they areby a store's cashier: paper or plastic? But as VOA's Ted Landphair explains in today's searching for solutions report, some communities
2007年VOA标准英语（八月）
China is working on next-generation bullet trains with a maximum operational speed of 400 km per hour that will be ready by 2020 for markets linked to the Belt and Road Initiative, the country's top railway vehicle maker said. 国内最大的轨道客车
英语新闻
LONDON, July 26 (Xinhua) -- It landed at Lands End on the extreme south-west coast of England 69 days ago and after making its way around the British Isles, the Olympic Torch finally reaches the Olympic stadium on Friday. When it reaches the end of i
英语新闻
Sophie Madeleine - The Knitting Song 惬意的编织之歌 歌词： I'm going to knit myself a sweater. A sweater that will keep me warm at night. Just how many days here must I weather? Just biding my time... 'cause when I call you on the phone, I'
经典英文歌曲