Even the mild variety has symptoms that include abnormal skeletal development and, sometimes, slight mental retardation.

即使是温和一点的，也会引发许多症状，包括骨骼发育异常，有时还会有轻度精神发育迟滞。

Unfortunately, iron deficiency anemia in growing children has been associated with cognitive deficits due to abnormal brain development.

不幸的是，生长中的儿童缺铁性贫血与大脑发育异常导致的认知缺陷有关。

As a result, dopamine, norepinephrine, and serotonin levels in the brain begin to fall, leading to abnormal brain development and intellectual disability.

如此一来，脑中多巴胺、去甲肾上腺素和血清素的水平开始下降，从而导致大脑发育异常和智力障碍。

His crucial finding was that girls in both groups more often had mutations of the sort associated with abnormal neural development than boys did.

他的关键发现是两组中，女孩比男孩更多有伴随异常神经发展种类的基因突变。