on the fly: (originally) on the wing, flying; (hence) in motion, moving up and down. gen. Also slang = ‘on the spree’.
| 单词 | θ111269 |
| 释义 | the world > movement > in motion [phrase] > while in motion (1) on the fly1851 on the fly: (originally) on the wing, flying; (hence) in motion, moving up and down. gen. Also slang = ‘on the spree’. |
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