例句:
"Hurry! The hour glass is running out - so that means that our 60 seconds are almost up", said Paula to her team members. 
The Noun Project
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CC版權：出處標示，商業用途
Regionalism:
Neutral
Regional variant:
Neutral
Full Expression:
Scientific Instruments: hour glass
This simple device, normally made from sand and wood, was used to measure time periods before clocks and watches were invented.