| 短语 | out of the blue |
| 释义 | out of the blue informalif something happens out of the blue, it is very unexpected出乎意料地，突如其来地⇒a bolt from (out of) the blue at BOLT¹ (3)out of the ˈblueunexpectedly; without warning出乎意料；突然；晴天霹雳The decision came out of the blue.这个决定来得很突然。 |
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