上穷碧落下黄泉，两处茫茫皆不见

【名句】上穷碧落下黄泉，两处茫茫皆不见

[注释与译文]穷，寻求到尽头。碧落，天空。黄泉，地下深处。这两句写道士奉命为唐玄宗寻找杨贵妃幽魂的景况，大意是：他升天升到最高层，下地下到最底端，遍处寻找，但都没有见到贵妃的亡灵。现借用这两句诗表示某种东西纯属虚构捏造，脱离现实，因而踪迹难寻。

参考文献

(唐)白居易《长恨歌》

上穷碧落下黄泉，两处茫茫皆不见shàng qióng bì luò xià huáng quán , liǎng chù máng máng jiē bù jiàn

can not be found even by searching the blue sky above and the yellow springs below; though one searches the sky and nether region,there is no sign of sth or sb
❍ 爬上天空二十丈和钻下地面二十丈，结果还是一无所能，学问是“～”了。(鲁迅《朝花夕拾·琐记》60) We had climbed two hundred feet into the sky and burrowed two hundred feet into the earth,but the result was that we still could do nothing. Knowledge was something that“could not be found even by searching the blue sky above and the yellow springs below. ”/排云驭气奔如电，升天入地求之遍； ～。(白居易《长恨歌》) Swift as lightning,through the air he sped,|Up to the heavens,below the earth,everywhere. | Though they searched the sky and nether regions,|Of her there was no sign.