The world is very different, and practicing tolerance in your own school and city can help make a difference.

世界已经大不一样了，在你自己的学校和城市里践行宽容可以帮助改变世界。

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Babies can tell the difference among different sounds.

婴儿能分辨出不同的声音。

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They have a different kind of superpower that all of us possess: the power to make a difference in the lives of others.

他们拥有我们所有人都有的另一种超能力: 改变其他人的生活的能力。

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We can tabulate them. We can know them, and then when we have reactions that inter-convert different compounds, we can calculate the heat of reaction is just the difference between the heat of formation of the reactants, and the heat of formation of the products, right.

种化合物的生成热，可以把它们列成表,可以认知它们，而当我们要处理，在不同化合物间转变的反应时,我们只要计算反应物和,生成物的生成热之间的不同,就能计算出反应热。

麻省理工公开课 - 热力学与动力学课程节选

Money for Good II report shows a vast difference in the dollar-for-dollar results produced by different NGOs.

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The difference, the researchers say, is most high-fliers display different personas at work versus home.

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So Sharpe did a Monte Carlo simulation of 1 million different 30-year investment outcomes, getting roughly the same difference in return.

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