| 词汇 | before you can say Jack Robinson |
| 释义 | before you can say Jack Robinson idiom old-fashioned informal 转瞬间，一眨眼 used to say that something happens very quickly Before you could say Jack Robinson, she'd jumped into the car and driven away. 一眨眼的功夫，她已经跳上汽车开走了。 |
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