第21對三體綜合症 dì'èrshíyīduìsāntǐzōnghézhèng Down syndrome Definitions Defs Origin Strokes Stroke Words Sentences Sents 第21对三体综合症 第21對三體綜合症 dì'èrshíyīduìsāntǐzōnghézhèng Down syndrome trisomy 21, a genetic disorder caused by the presence of all or part of a third copy of chromosome 21 Cross-References Synonym 唐氏症 tángshìzhèng
第21对三体综合症 第21對三體綜合症 dì'èrshíyīduìsāntǐzōnghézhèng Down syndrome trisomy 21, a genetic disorder caused by the presence of all or part of a third copy of chromosome 21 Cross-References Synonym 唐氏症 tángshìzhèng
