本病病因比较复杂，最初认为猝死症是一种综合症，可能由多种原因引起。

This disease was considered as a syndrome caused by poly-agents at the beginning.

youdao

本病病因比较复杂，最初认为猝死症是一种综合症，可能由多种原因引起。

This disease was considered as a syndrome caused by poly-agents at the beginning.

youdao