给幼儿阅读还可以扩充他们的词汇量、改善记忆，使得他们练习听力。

Reading to young children also expands their vocabulary, improves memory, and allows them to practice listening skills.

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练习4 - 3在有了基本框架后，对计算器程序进行扩充就比较简单了。在该程序中加入取模(%)运算符，并注意考虑负数的情况。

Exercise 4-3. Given the basic framework, it's straightforward to extend the calculator. Add the modulus (%) operator and provisions for negative Numbers.

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为了要在任何的情形中觉得完全自信，你需要改善你的范围表达，扩充你的字汇和练习你的交谈技术。

To feel absolutely confident in any situation, you need to improve your range of expressions, extend your vocabulary and practice your conversation skills.

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