Observation. Observation is an effective method to test the operation of internal control (e. g., separation of duties) without written record.
观察。观察是测试不留下书面记录的控制(如职责分离)的运行情况的有效方法。
The test laboratory quality control includes internal and external quality control method.
检测实验室质量控制分为内部质量控制和外部质量控制。
The method is simple, accurate and can be used to control the internal quality of F.
本方法简便、准确、 重复性好，可用于平贝母的质量控制。
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