The tissues were randomly allocated to fresh, vitrification and conventional slow freezing groups.
组织被随机分配到新鲜组、玻璃化冷冻组和慢速冷冻组。
Once people have been randomly allocated to groups, the counter-argument about self-selection is ruled out.
一旦人们被随机分配到各组，就排除了自我选择的反对理由。
Methods: 76 cases (84 eyes) with fundus bleeding were allocated to 2 groups randomly.
方法：将76例（84眼）眼底出血患者随机分为2组。
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