Be sure you have a paper and a sharp pencil ready.

你要确保你备有稿纸和削好的铅笔。

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When learning computer programming, I found it helpful to look at a function like a pencil sharpener. A parameter was a dull pencil, inside processes sharpened and returned a sharp pencil.

我在学编程时，常把程序比作卷笔刀，而把参数比作钝铅笔，经过处理我们就得到尖铅笔了。

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I sat down with my textbooks and a nice sharp pencil.

我拿着课本和一支好用的尖头铅笔坐下来。

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