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[00:00.00]在线英语听力室( www.tingroom.com )友情制作 [00:03.89]2002 Text3 [00:07.33]Could the bad old days of economic [00:09.54]decline be about to return? [00:11.96]Since OPEC agreed to supply-cuts in March, [00:15.39]the price of crude oil has ju
Callum: Hello, I'm Callum Robertson and this is Entertainment. st This week sees the release of the 21 Bond film, Casino Royale and it's the first film to star actor Daniel Craig as the British Secret Service spy 007. James Bond was the creation of
pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
A really fresh blood like that,is so rich... 真正的新鲜血液 是很有营养的 minerals, vitamines, energy everything you need, to survie. 含有矿物质 维生素 能量 一切你生存所需要的东西 And so many nomads and tribes all ove
I know that solar energy can be used to make electricity and to heat water and air. But can solar power also be used to make liquid fuels? Until recently, the practical answer was no. Photovoltaic panels absorb sunlight and use it to create an electr