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201220162020三年閏年一年366天其餘一年365天,則365×7+3×366=3653天一天24小時:3653×24=87672小時一小時60分:87672×60=5260320分鐘一分鐘60秒:5260320×60=315619200秒所以2011到2021這10年一共3653天,8767…
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