5th 第五 Today is the fifth (of May). 今天是(五月)五號。 the fifth century BC 公元前五世紀 It's her fifth birthday. 這是她五歲生日。 My office is on the fifth floor. 我的辦公室在六樓。 It's the fifth time that I've been to America. 這是我第五次去美國了。 Her mother had just given birth to another child, her fifth. 她的母親剛又生了孩子,她的第五個孩子。 the world’s fifth-largest oil exporter 世界第五大石油輸出國 He finished fifth in the race. 他賽跑得了第五名。 Edward V (= Edward the Fifth) 愛德華五世