利用流沙计时的器具。 虽能直观确认时间，但维护起来颇为不便。
A device that measures time using falling sand. It allows you to intuitively confirm the time, but is cumbersome to maintain.
利用流沙计时的器具。 虽能直观确认时间，但维护起来颇为不便。
A device that measures time using falling sand. It allows you to intuitively confirm the time, but is cumbersome to maintain.