词组 | be as sharp as a tack |
释义 | Idiom be as sharp as a tack American to be very intelligent.He may be old, but he's still as sharp as a tack. be as sharp as a tackTo be intelligent and a quick-thinker. Ted's as sharp as a tack, so he'll find a solution to this problem. Of course Ellen is our valedictorian—she's as sharp as a tack. |
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