speaker(of a legislative body);president 当然～president ex officio/众议院～Speaker of the House of Representatives（美）(副总统是参议院的当然议长The US Vice President serves ex officio as President of the US Senate.副总统缺席时由一位有权主持会议的多数党参议员担任临时主席President protempore)/下院～Speaker of the House of Commons（英）(掌玺大臣兼任下院领袖；上院议长由大法官兼任)