时间是沙漏
[shí jiān shì shā lòu]
沙漏 is an hourglass used traditionally to measure the passage of time. So '时间是沙漏' likens time to the flowing sand of an hourglass. Each grain slowly falls just as moments pass inexorably and irreversibly, expressing time’s unstoppable yet steady pace. It evokes the concept of limited duration in human life, as well as how quickly it passes without pause.