在孕前和孕期食用添加叶酸的强化谷物，防止胎儿发育过程中的神经管缺陷。
Eating grains fortified with folate before and during pregnancy helps prevent neural tube defects during fetal development.
结果表明，该缺陷与强化相析出有关，金相与电镜观察证明，该区域是析出质点富集区经氧化形成的。
The metalurgraphic and electron microscopic inspection found that the black spot defects are formed by the oxidation of particle enriched zone.
背景：注意缺陷多动障碍存在着强化机制的异常，而冲动性是强化机制异常的主要表现。
BACKGROUND: Abnormality exists in the process of the strengthening mechanism of attention deficit hyperactivity disorder, and impulsivity is the main manifestation of abnormal strengthening mechanism.
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