if we had ham we could have ham and eggs, if we had eggs
谚语
英文释义
谚语
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Draws attention to the futility of a plan or strategy in the absence of the resources necessary for it to work.
— The situation reminds me of the statement that "if we had ham, we could have ham and eggs — if we had eggs" — but in a world in which there are no hens. In theory, truly secure systems are impossible.
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数据来源: Wiktionary