因为不满足于让计算机完成全部的算术工作，数学家同时也在信封背面进行一些计算工作。

Not content with letting thesupercomputer do all the arithmetic, the mathematicians simultaneously jotteddown some calculations of their own on the back of an envelope.

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它在各种各样的计算机系统上运行，尤其擅长于涉及任意长度整数和小数、图、矩阵和多项式代数的算术。

It runs on a variety of computer systems and is especially good at arithmetic involving arbitrary-length integers and fractions, graphics, and matrix and polynomial algebra.

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计算机能将若干字符连成串，用一些字符代替其他字符或另行处理字符串，而不是用算术方法或逻辑方法处理字符。

Rather than arithmetically or logically manipulating characters, a computer may concatenate strings of characters, replace some characters with others, or otherwise manipulate character strings.

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