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when toggle format what by license comment
Jun 5, 2018 at 22:42 comment added Spencer You need to cover the figurative uses of this phrase.
Jun 15, 2012 at 3:23 comment added JAM There's also "out of the blue," in which presumably blue means the same thing (ocean or sky).
Jun 15, 2012 at 1:42 vote accept Yang
Jun 15, 2012 at 1:29 history answered user22244 CC BY-SA 3.0