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HP not only launched a succession of world-changing products, such as the pocket calculator.
惠普不仅创造出一系列改变世界的产品, 比如便携式计算器.
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In terms of promoting basic skills, though, they have all the virtues of pocket calculator.
但是就加强基本技能来说, 它们和便携式计算器没什么两样.
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One handy example is the replacement of the slide rule by the pocket calculator.
一个简便的事例是用袖珍计算器代替计算尺.
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