This paper also studies the realization principle and key technique of software test automation tools for GUI.
在此基础上，给出了用户界面软件测试自动化工具的实现方案和关键技术。
The realization principle indicates that revenue should he recognized at the time goods are sold or services are rendered.
实现原则是指收入应该在销售商品和提供劳务的那一时刻加以确认。
The realization principle of digital mask technology is studied emphatically, and the experimental validation is carried out.
重点研究了数字掩模技术的实现原理，并进行了验证。
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