Testing Record Library: Recording every student's score, errors, mastery condition of every part of knowledge in every test.
测试记录库：记录每个学生每次测试的成绩、出错情况、对每一部分的知识掌握情况。
Testing is a complicated problem and long experience is required for its mastery.
进行测试是一个复杂的问题，需要有长期的经验才能掌握。
The spacewalk was mainly aimed at testing China's mastery of the technology involved.
这次太空行走旨在检测中国对航天技术的掌握情况。
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