这些孩子在1997-2003年之间出生，并且参加了国家出生缺陷预防研究，这项研究从10个州的10个出生缺陷监测系统中提取数据。
The children were born between 1997 and 2003 and were participants in the National Birth Defects Prevention Study, which drew data from 10 birth-defect surveillance systems in 10 states.
很多医生都认为：当症状变得严重后用药已经很迟了，所以在目前，很多研究人员开始对部分人群进行精神认知缺陷的检测，以期能够提早预防阿氏病的发生。
Many doctors believe drugs are being given too late, after symptoms are severe, so researchers more recently have started testing some in people with mild cognitive impairment.
对昆钢热轧板卷边裂缺陷机理及成因进行了研究分析，提出了相应的预防控制措施，取得了较好的效果。
The mechanism and cause of edge cracking defect of hot-rolled strip in Kunming Iron & Steel co.
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