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the superpower 超级大国
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电力，功率：
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power plant 电力厂
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power failure 停电
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a telescope of high power 大功率的望远镜
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a 30 horse-power engine 一台30匹马力的发动机
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strength主要指“气力”、“体力”：
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Does he have enough strength to lift these weights？他有足够的气力举起这些重物吗？
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The athlete reserved his strength for the race．运动员保持体力来参加赛跑。
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I wish I had your strength．但愿我有你这么大力气。
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也可表示“力量”：
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He underestimated the enemy’s strength．他低估了敌人的力量。
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Her strength of will was extraordinary．她的意志力是很突出的。
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I admired his immense physical strength．我很佩服他强大的体力。
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713 practical—practicable
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practical主要表示“实际的”、“现实的”：
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He was weak in practical matters．他处理实际事务不行。
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There is always a lot of practical work to be done．总有许多实际工作要做。
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Let’s be practical．咱们现实一点。
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We have to look at things in a practical way．我们必须现实地看问题。
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也可表示“讲求实际”：
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She was simple, practical, hard-working woman．她是一个朴实、讲求实际、勤劳的女人。
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We’ve got to be practical and buy what we can afford．我们得讲求实际，只买我们买得起的东西。
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He was a practical man and opposed to theory．他是个讲求实际的人，反对理论。
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还可表示“切实可行的”、“实用的”：
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