主持讨论 meaning in Chinese

preside over chair eg

Evidently accustomed to lead debates and bring forward motions , he began speaking in a low but audible voice
他显然惯于主持讨论和处理问题。他的声音很低，但还听得见。
Each member will take turns to lead the discussions . all members will read the texts before each meeting and prepare questions for discussion
我们采轮流带领读经讨论的方式,每次读书会有一人负责主持讨论.参加读书会的成员应该先预习及准备问题
Pfuhl merely snorted contemptuously and turned his back to indicate that he would never stoop to reply to the rubbish he was hearing . but when prince volkonsky , who presided over the debate , called upon him to give his opinion , he simply said : why ask me
普弗尔只是轻蔑地抽抽鼻子，扭过头去，表示他无论何时也不屑于反驳他现在听到的废话，但是当主持讨论的沃尔孔斯基公爵请他发表自己的意见时，他只是说：