曾经沧海难为水，除却巫山不是云。取次花丛懒回顾，半缘修道半缘君加上译文

这句诗出自唐代诗人元稹的《离思五首·其四》，表达了诗人对离别之情的深切怀念。下面是这句诗的译文：

曾经沧海难为水，除却巫山不是云。 Once I've seen the vast ocean, other waters seem shallow; once I've seen the clouds of Mount Wu, other clouds are not as enchanting.

取次花丛懒回顾，半缘修道半缘君。 I pass by the flowers without looking back, half for the path of cultivation, half for you.

这首诗通过对比和象征，表达了诗人对曾经深爱之人的怀念和对修道生活的向往。