officiate/əˈfɪʃɪeɪt; ə`fɪʃɪˌet/ v[I, Ipr]~ (at sth) perform the duties of an office(4) or position 执行职务; 主持 The Reverend Mr Smith will officiate at the wedding, ie perform the marriage ceremony. 史密斯牧师将主持婚礼.
牛津英汉双解词典