But such experiments show only that a truly impoverished and unnatural environment leads to poorer developmental outcomes than a more natural environment with opportunities to play and interact.

但是这种实验只能证明，确实缺乏刺激物和不自然的环境比有机会玩耍和互动的更自然的环境更容易造成不良的发育后果。

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Randomized trials in which elements of developmental care are compared to routine nursery care for infants < 37 weeks gestation and that measured clinically relevant outcomes.

对小于37周早产儿将进行发展性照顾与该龄早产儿常规育婴室护理进行比较，并测定临床相关结局的随机试验。

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Randomized trials in which elements of developmental care are compared to routine nursery care for infants < 37 weeks gestation and that measured clinically relevant outcomes.

对小于37周早产儿将进行发展性照顾与该龄早产儿常规育婴室护理进行比较，并测定临床相关结局的随机试验。

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