随机分配(allocation at random)随机分组的目 的将研究对象随机分配到实验组和对照组， 以使两组具有相似的临床特征和预后因素， 即两组具备充分的可比性。
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allocation at random
随机分配
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Trials were considered for inclusion with the following criteria: random allocation of participants; no compromised manual dexterity; unsupervised powered toothbrushing for at least 4 weeks.
我们根据以下的标准收录试验：参与者随机分配、没有手动灵巧度降低的问题、持续至少4周，在未经监测的状况下，使用电动牙刷刷牙。
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Some local authorities have resorted to random allocation of school places, which at least is scrupulously fair.
ECONOMIST: Ministers want to make the great schools game harder to play
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