沧海cānghǎi
[deep blue sea;the sea] 大海.以其一望无际、水深呈青苍色,故名
东临碣石,以观沧海.——《乐府诗集·曹操·步出夏门行》
沧海桑田
cānghǎi-sāngtián
[the swift changes of the world;great changes are seen in the course of time;the evanescence of the worldly affairs is like the sea turned into a mulberry field (orchid)] 大海变成了种桑树的田地,种桑树的田地变成了大海.比喻世事多变,人生无常;或喻世事变化的巨大迅速——略称沧桑
山河改转,沧海桑田
沧海一粟
cānghǎi-yīsù
[a drop in the ocean] 沧海浩大,一粟渺小.比喻人生在世犹一粟于沧海之中