big sample 大样
big rock sample 大块岩样
big-sample data 大样本数据
big sample method 大样本法
big sample principle 大样本定律
big sample experiments 大样本实验
big sample randomized controlled 大样本随机对照
big sample randomized controlled trial 大样本随机对照试验
Nowadays, there is no big-sample research about hot point mutations of ATP7B gene in north Chinese with WD;
目前尚缺乏中国北方WD患者ATP7B基因突变热区的大样本研究；
Two teaching experiments were conducted and a big-sample questionnaire was carried out to test its efficiency.
在实践中进行了两次教学实验，同时进行了大样本的问卷调查，检验其效度。
If I only tried to ring once or twice then is that really a big enough sample?
如果我只是试图打一两次，那么这是一个足够大的样本了么？
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