preside
/prɪˈzaɪd; prɪ`zaɪd/ v
1 [I, Ipr] ~ (at sth) be chairman (at a conference, meeting, etc) （在会上）担任主席; 主持（会议等）
the presiding officer 主持会议的官员
Whoever presides will need patience and tact. 无论谁作主席, 都需既要有耐性, 又要机敏老练.
The Prime Minister presides at meetings of the Cabinet. 首相主持内阁会议.
2 (phr v) preside over sth
(a) be head or director of sth 掌管或领导某事物
The city council is presided over by the mayor. 市政委员会由市长领导.
(b) control or be responsible for sth 管理某事物; 对某事物负有责任
The present director has presided over a rapid decline in the firm's profitability. 现任领导对公司利润的急剧下降负有责任.