济济一堂: a gathering of many people; (a big audience) filled the hall.; a great assemblage of people in a hall; a large gathering in an auditorium; gather together under the same roof; the house is
上流人士济济一堂的盛会: a glittering occasion attended by the whole of high society
政界: political circles; government circles 短语和例子进入政界 enter politics; 退出政界 withdraw from political life; 政界元老 senior statesman