cānghǎi
〖deepbluesea;thesea〗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》
cānghǎi-sāngtián
〖theswiftchangesoftheworld;greatchangesareseeninthecourseoftime;theevanescenceoftheworldlyaffairsisliketheseaturnedintoamulberryfield(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