当女孩们拿到她们的账单时，会拿出便携式计算器。
When the girls get their bill, out come the pocket calculators.
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。
HP not only launched a succession of world-changing products, such as the pocket calculator.
尽管在训练基本技能方面，它们拥有便携式计算器的具备的所有优点。
In terms of promoting basic skills, though, they have all the virtues of a pocket calculator.
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