hourglass [i =uqRgl@s | `gl!:s ]    (¼øÀ§: 14414 - ´ëÁ¹ ¼öÁØ)  
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Mean An instrument for measuring time, consisting of two glass chambers connected by a narrow neck and containing a quantity of sand, mercury, or another flowing substance that trickles from the upper chamber to the lower in a fixed amount of time, often one hour.
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