Many people imagine that a computer is a very large adding machine.

不少人想像计算机是一个很大的加法机器。

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But, in fact, an abacus is an adding machine, calculator, and computer.

可是，实际上，算盘是一个加法机，计算器和计算机。

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But, in fact, an abacus is an adding machine, calculator, and computer.

可是，实际上，算盘是一个加法机，计算器和计算机。

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