adjective [原级] 第五的；五分之一的
India spends over a fifth of its budget on defence. 印度在国防上支出预算的五分之一以上。
noun [专属名词] 第五；五分之一
He finished fifth in the race. 他赛跑得了第五名。
numeral [序数词] 第五
Joe has recently returned from his fifth trip to Australia. 乔最近从他第5次澳大利亚之旅返回。
