世界性古老問題 [ㄕˋ ㄐㄧㄝˋ ㄒㄧㄥˋ ㄍㄨˇ ㄌㄠˇ ㄨㄣˋ ㄊㄧˊ; shi4 jie4 xing4 gu3 lao3 wen4 ti2] a problem as old as the world itself ◄ ►