正文可以从4点变到108点，但印刷质量丝毫不会降低。
Text can be scaled from 4 points to 108 points without any loss of quality.
它能帮助学生理解，而印刷出来的作业任务是无法做到这一点的。
It helps students understand in a way that you can't do with print homework assignments.
但它却是一个非常重要的印刷错误，而你或许会为我为何会如此粗心以致忽视这一点而疑惑。
But it was a very prominent misprint and you will perhaps wonder how I could have been so careless as to overlook it.
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