举个例子，比如说一个小孩，天生遗传缺损。

An example might be a child, born with a genetic defect.

youdao

一些孩子还是血脉相连的，因为他们的膝盖骨上都有一种先天性的骨质缺损，这种遗传基因是非常罕见的。

Some of the babies were related as they showed a congenital bone defect on their knee bones, which is a very rare gene.

youdao

努南综合症被定义为一种常染色体显性的遗传性综合症，其一般特征为身材矮小、先天性心脏缺损、以及独特的面部特征。

Noonan syndrome is defined as an autosomal dominant genetic syndrome commonly characterized by short stature, congenital heart defects, and unique facial features.

youdao