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[00:00.74]Unit 4 Inventions and Inventors [00:04.53]Expansion 4 [00:09.77]Exercise 1 [00:12.06]Have you ever asked yourself [00:14.11]why the letters on your computer keyboard [00:16.62]are placed in this strange way? [00:19.42]Why are the keys not o
北师大版初中英语九年级（全一册）
[00:00.90]Unit 4 Inventions and Inventors [00:04.80]Lesson 16 [00:09.87]Exercise 1.2 [00:13.52]Today's competition is about inventors. [00:16.74]I'll describe the inventors and all the four [00:19.58]groups here will guess who I'm describing. [00:22.
北师大版初中英语九年级（全一册）
This is the VOA Special English Economics Report. Recently, the United States Supreme Court decided a case on the property rights of inventors. The question was whether a business method is enough of an invention to receive a patent. Patents are a fo
2010年VOA慢速英语(七)月
Gadget Inventors Reach Customers Through TV Ads 小工具发明人通过电视广告售出产品 HOUSTON Many of the most innovative gadgets sold in America today are speciality items -- generally marketed through extravagant late-night TV commercial
VOA标准英语2014年(二月)
the approaches, a book that would surely make America's founders, Founding Fathers proud, maybe laugh a little bit too.The author of Gadget Nation explains why the freedom to go after your dreams can lead to some pretty whacky inventions. Hi,I'm Stev
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