Only child syndrome or oldest child syndrome.

独生子女综合症 还是长子综合症。

321.- This is first- child syndrome. - What?

头生子综合征 -什么玩意儿？

Fortunately, the common defects occurring in a majority of Down's syndrome children were absent in Paula. She has no intestinal malformations, hearing impairment, or severe visual problems.

幸运的是，宝拉没有出现大多数唐氏综合症儿童的常见缺陷。她没有肠道畸形、听力障碍或严重的视力问题。