睁一眼闭一眼 zhēngyīyǎnbìyīyǎn to turn a blind eye Origin Definitions Defs Strokes Stroke Words Sentences Sents 1 sentence 海豚睡觉睁一眼闭一眼。 hǎitún shuì jiào zhēng yī yǎn bì yī yǎn. Dolphins sleep with one eye open. Source: AI Challenger 2017