At best this caused hard to maintain code and at worst brittle code that fails when new types in the enterprise extend existing types.
即使最好的情况下这也会带来代码维护的困难，而最坏的情况当企业扩展现有类型而引入新类型时，脆弱的代码就会失效。
A outstanding problem in control software of TV follows the measuring system at present is it is hard to reuse and extend the code.
现有的电视跟踪测量系统的主控软件的一个很突出的问题是代码的重用性和扩充性差。
Upon the approaching of Teachers' Day, we'd like to extend our salute to Mr. Luo. Thanks for all his hard work, and wish him all the best in the coming years.
在老师节降临之际，我们向罗老师表示问候，感谢他多年来的辛勤教学，祝福罗老师一切顺利！
Upon the approaching of Teachers' Day, we'd like to extend our salute to Mr. Luo. Thanks for all his hard work, and wish him all the best in the coming years.
在老师节降临之际，我们向罗老师表示问候，感谢他多年来的辛勤教学，祝福罗老师一切顺利！
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