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I'd say the difference between "on a whim" and "at whim" is that "on a whim" relates to a single event, "at whim" to repeated occurrences.
ps: 沒有 at a whim 的用法,請同學們注意
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I'd say the difference between "on a whim" and "at whim" is that "on a whim" relates to a single event, "at whim" to repeated occurrences.
ps: 沒有 at a whim 的用法,請同學們注意
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