更多的钱:钱能使人做奇怪的事(1)
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自由呼吸:设计炉灶的艺术(1)
自由呼吸:设计炉灶的艺术Hints:Aprovecho Research CenterDean Still More than 3,000,000,000 people are at risk from indoor air pollution because of the heating or cooking fuels they use. Most live ...
西点军校的军事教育(1)
西点军校的军事教育Hints:BrazilHudson River Claudio Messias Gentil General George WashingtonThomas Jefferson Today we answer a question from Brazil. Claudio Messias Gentil wants to know about the ...
冷藏食品的一些小贴士(1)
食物冷藏的一些方法。Hints:evaporative cooler organism damageBefore refrigerators were invented, the next best thing was an ice box. But another way to keep food fresh is to use an evaporative coo...
布什意否决过度开支(1)
布什总统称民主党的开支提议不符合现在的财政政策方向President Bush says his record tax cuts have produced record tax revenues by putting more Americans to work and thereby reducing the nation's bud...