必經之路 [ㄅㄧˋ ㄐㄧㄥ ㄓ ㄌㄨˋ; bi4 jing1 zhi1 lu4] the road one must follow or take the only way same as 必由之路[ㄅㄧˋ ㄧㄡˊ ㄓ ㄌㄨˋ; bi4 you2 zhi1 lu4] ◄ ►