21????
??Down????????????1600800????60???
21???????21????????????
21???????????660????????????????2024???1/149040?1/10649?1/11?????I?????80???35?35???? ?????????14??????????????
???????????????????60?????????????????????????????????40???????????????? [?]21??1866?????????????Mongolism????mongolian idiocy???????????????????????
1959??????(Jerome LeJeune)???21???????????
1961????The Lancet???
1965?WHO?????? [?]21????????????? ?????????????????????????????????????????????????????????????????????? [?]21???...
21???????21????????????
21???????????660????????????????2024???1/149040?1/10649?1/11?????I?????80???35?35???? ?????????14??????????????
???????????????????60?????????????????????????????????40???????????????? [?]21??1866?????????????Mongolism????mongolian idiocy???????????????????????
1959??????(Jerome LeJeune)???21???????????
1961????The Lancet???
1965?WHO?????? [?]21????????????? ?????????????????????????????????????????????????????????????????????? [?]21???...
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