编制一个好的程序，首先要确保它的正确性和可靠性，除此以外，通常更注重源程序的(66)。

 还应强调良好的编程风格，例如，选择标识符的名字时应考虑(67)；在书写语句时应考虑(68)；

 在书写功能性注解时应考虑(69)。

 源程序中应包含一些内部文档，以帮助阅读和理解源程序，源程序的内部文档通常包括选择合适的标识符、注解和(70)。

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Most computer systems are (71) to two different groups of attacks：insider attacks and outsider attacks．A system that is known to be (72) to an outsider attack by preventing(73) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (74) users．Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment,but also helps to prevent future attacks．These attacks are usually (75) by tools referred to as Intrusion Detection Systems．

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对象是面向对象开发模式的(47)。每个对象可用它自己的一组(48)和它可执行的一组(49)来表征。应用执行对象的(49)可以改变该对象的(48)。

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