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But lawmakers as well as American military commanders are concerned by violence in Iraq, particularly about the possibility that tensions between Arabs and Kurds could expand into widespread violence.
VOA: standard.2009.09.10
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What happens as you expand into volume?
自由膨胀过程中发生了什么？
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When you expand a real gas into vacuum, the temperature goes down.
当一个真实气体，向真空膨胀咱的时候温度会下降。
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"Right now we're mostly sampling for hydrocarbons and other bacteria, but what we would like is expand into some other chemical compounds that may be contained within the dispersants."
VOA: standard.2010.06.01
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I'm not going to expand on this because I can't get into-- This is not a course in probability theory but I'm hopeful that you can see the formula and you can apply it.
我不准备拓展这一部分,毕竟这节课不是概率论,但我希望你们能记住这个公式,并且学会应用
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With no natural predator in the water, and almost no domestic market to sell them as food, Asian Carp threaten to expand into waterways through the city of Chicago, and into Lake Michigan, about 320 kilometers northwest of Havana.
VOA: standard.2010.07.20
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And here, in an isothermal expansion, The bath is putting back the energy that the gas is expanding or using to expand, and so the energy is flowing back into the gas through the environment in the isothermal expansion.
而在等温膨胀中，恒温环境将气体膨胀对外做功,而损失的能量又返还回来，在等温膨胀中,能量从环境,流向系统。
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He had a system. He would describe characters and plots, then have ghostwriters expand those ideas into a book.
VOA: special.2009.08.24
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The deal was widely seen as surrender to Taliban control of the valley, but it collapsed after militants refused to lay down arms and moved into neighboring districts to expand their influence.
VOA: standard.2009.07.26
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"One small business owner wrote to me that health care costs are-and I quote-' stifling my business growth" "He said that the money he wanted to use for research and development, and to expand his operations, has been instead been 'thrown into the pocket of health care insurance carriers."
VOA: standard.2009.10.03
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