The single-factor design with multiple levels is a common experimental design for clinical studies on drug efficacy and it has very broad applicability.
单因素多水平设计是药学科研中经常用到的一种试验设计方法，在临床药物疗效研究方面具有十分广泛的适用性。
It is not only easy to calculate, but also matches the needs in engineering and has better common applicability.
该方程形式简单，精度可以满足工程应用需要，且具有较广的适用性。
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