Ví dụ: 
"Hurry! The hour glass is running out - so that means that our 60 seconds are almost up", said Paula to her team members.
Giấy phép ảnh: 
CC: Ghi nhận, sử dụng thương mại
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Scientific Instruments: hour glass
Tiếng Pháp
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Tiếng Tây Ban Nha
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Tiếng Đức
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Tiếng Bồ Đào Nha
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This simple device, normally made from sand and wood, was used to measure time periods before clocks and watches were invented.

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Tiếng Ý
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Alsacien
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