因此，研究如何保证并提高软件产品的质量和可靠性已成为计算机科学的一个重要领域。
Therefore, how to guarantee the quality and the reliability of the software product has been an important research direction of the computer science.
这些研究将提高系统的供电可靠性和供电质量。
The research will improve the reliability and quality of power supply.
软件测试是保证软件质量及可靠性的关键，其主要研究如何选择和产生测试用例，以发现软件中潜在的错误。
Software testing is the key to guarantee software quality and reliability, it mainly studies how to select and gain test cases to find faults.
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