掌握控制to control

• 多年来，我国的医疗事故鉴定权始终掌控在医疗系统内部。

  For many years, the right to assess medical incidents in China has been kept within the medical system.

• 主导传播媒介，掌控意识形态传播阵地。

  Guide the broadcast media and control the battlefield of ideological broadcasting.