1·The old rules have to be revised because they only applied to the circumstances that existed a hundred years ago.
旧规则必须修改，因为它们只适用于一百年前的情况。
2·The old rules have to be revised because they only applied to the circumstances that existed when they were made a hundred years ago.
旧的规则必须修改，因为它们只适用于一百年前制定规则时存在的情况。
3·However, if the existing development environment is to be retained, some current development practices may need to be revised.
但是如果要保留现有的开发环境，那么可能需要修改某些现行的开发惯例。
4·In the triangle tester example above, I revised my design based upon the tests I wrote.
在上面的三角形测试实例中，我按照自己书写的测试修改了设计。
5·For example, if hidden attributes are discovered to be embedded in a text string during data profiling, then these can be made explicit in a revised canonical data model.
例如，如果在数据配置期间发现有隐藏的属性嵌入在文本字符串中，就可以修改规范化数据模型，把它们变成显式的属性。