天有不测风云

[tiān yǒu bù cè fēng yún]

• Anything unexpected may happen. a bolt from the blue
• Something unexpected may happen any time.

参考释义

天有不测风云 [tiān yǒu bú cè fēng yún]

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例句

1. 天有不测风云，人有旦夕祸福。
   Nothing is so certain as the unexpected.