there were two more rounds of auditions. conant passed both with flying colors. but once celibidache and the rest of the committee actually saw her, all those long－held prejudices began to compete with the winning first impression they had of her performance. she joined the orchestra as second trombone. \'you know the problem, celibidache told her. we need a man for the solo trombone. it is evident that conant could not have joined the orchestra if it had not been for the screened audition.

밑줄친 all those를 어떻게 해석해야되나요...? 그리고, 문장에서 어떤역할을 하는지 알려주시면 좋겠습니다.