基本解释[数学]放回简单随机抽样英汉例句双语例句Firstly, we give an effective sampling design: a simple random case sample with replacement is drawn out of all cases;首先，我们设计了一个有效的抽样方案：采取简单随机抽样从病例组抽取样本；simple random sampling with replacement更多例句专业释义数学放回简单随机抽样