hoist one's flag

(of an admiral) take up command

升起（艦隊(duì)司令）旗幟，（艦隊(duì)司令）開始行使指揮權(quán)

hoist the flag

stake one's claim to discovered territory by displaying a flag

升旗（表示擁有所發(fā)現(xiàn)的領(lǐng)土）

hoist with one's own petard