智力发育不全 meaning in Chinese

intellectual deficiency
intellectual maldevelopment
oligophrenia

Phenylketonuria ( pku ) is an inherited metabolic disease that results in mental retardation and other neurological problems when treatment is not started within the first few weeks of life . the disease arises from the deficiency of a single enzyme , phenylalanine hydroxylase , which converts the essential amino acid , phenylalanine , to another amino acid , tyrosine . failure of the conversion to take place results in a buildup of phenylalanine in the body that then damages the central nervous system
苯丙酮尿症（ pku ）是一种智力发育不全的先天性疾病，患者由于肝赃内苯丙氨酸羟化酶缺乏，苯丙氨酸不能正常代谢为酪氨酸，从而导致苯丙氨酸在肌体组织内积累，引起脑损伤和累进性精神障碍，临床表现为智力低下,头发颜色转黄，尿有异臭味，重者似鼠臭。