《人有旦夕祸福》是什么意思,出处是出自哪里？

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• keep somebody sane
• keep somebody's mind off something
• keep somebody/something ↔ down
• keep somebody sweet
• keep somebody waiting
• keep something at bay
• keep something down
• keep something in check
• keep something in mind
• keep something in proportion
• keep something keep quiet
• keep something keep quiet about something
• keep something on ice
• keep something quiet
• keep something quiet/keep quiet (about something)