昼夜 zhòuyè, [晝夜], day and night/period of 24 hours/continuously, without stop 白昼 báizhòu, [白晝], daytime 昼 zhòu, [晝], daytime 不分昼夜 bùfēnzhòuyè, [不分晝夜], day and night/round-the-clock 俨如白昼 yǎnrúbáizhòu, [儼如白晝], as bright as daylight (idiom) 俾夜作昼 bǐyèzuòzhòu, [俾夜作晝], lit. to make night as day (idiom); fig. to burn the midnight oil/work especially... 俾昼作夜 bǐzhòuzuòyè, [俾晝作夜], to make day as night (idiom, from Book of Songs); fig. to prolong one's pleasure... 卜昼卜夜 bǔzhòubǔyè, [卜晝卜夜], day and night (to toil, to abandon oneself to pleasure etc) 夜行昼伏 yèxíngzhòufú, [夜行晝伏], to travel at night and lie low by day (idiom) 宰予昼寝 ZǎiYǔzhòuqǐn, [宰予晝寢], Zai Yu sleeps by day (idiom); refers to story in Analects of Confucius remonstra... 昼伏夜出 zhòufúyèchū, [晝伏夜出], nocturnal/to hide by day and come out at night 昼夜平分点 zhòuyèpíngfēndiǎn, [晝夜平分點], the equinox 昼夜节律 zhòuyèjiélǜ, [晝夜節律], circadian rhythm 昼短夜长 zhòuduǎnyècháng, [晝短夜長], the winter days are short and the nights long (idiom)