The mechanism of this was explained to be associated with erect postural hypotension or related to Valsalva's maneuver.

其机制谓与直立性低血压有关，或与乏氏动作有关。

youdao

The mechanism of this was explained to be associated with erect postural hypotension or related to Valsalva's maneuver.

其机制谓与直立性低血压有关，或与乏氏动作有关。

youdao