piāo / bó / zài / wài / de / rì / zi / lǐ / tā / cháng / yòng / Bā / shān / yè / yǔ / lái / biǎo / dá / duì / gù / xiāng / de / sī / niàn漂泊在外的日子里,他常用巴山夜雨来表达对故乡的思念。During his years away from home, he often used Ba Mountain night rain to express his longing for his hometown.