সময়: বিভিন্ন সংশোধনসমূহৰ মাজৰ পাৰ্থক্য
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1 নং শাৰী:
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[[File:Wooden hourglass 3.jpg|thumb|150px|right|The flow of [[sand]] in an [[hourglass]] can be used to keep track of elapsed time. It also concretely represents the [[present]] as being between the [[past]] and the [[future]].]]
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