He and his colleagues are therefore about to start regular tests on two groups of people suffering from mildly abnormal mental symptoms. One group is elderly and one is young.

于是博士和他的同事们对两组患有轻度精神异常的患者进行常规检验，一组是老年人，而另一组是年轻人。

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

虽然轻度的粘脂糖症的症状只是骨骼不正常发育，有时仅仅是轻度的智力缺陷。

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In humans, symptoms typically include skeletal deformities, mental retardation and abnormal enlargement of the spleen and liver.

MSN: Cause of rare and fatal dog skeletal disease pinpointed