extrinsic/ekˈstrɪn.zɪk/形容词外在的,外来的;非固有的,非本质的Eczema can have extrinsic causes.湿疹可能由外部因素引起。外在肌,外附肌The extrinsic eye muscles are six muscles external to the eye which control the way the eye moves.眼外在肌是眼球外部的六块肌肉,控制眼球的运动。想跟读,去练习