I read the following sentence but I don't understand what it means. ' Conservation is to preservation as conserve is to jam.' What does this sentence mean? Is it grammatically OK?
It means that "conservation" is related to "preservation" in the same way (or analogous way) as "conserve" is related to "jam". "conserve" and "jam" are both words for a kind of thick syrup made with fruit. I'm not sure if this is just meant as a jokey wordplay, or whether there is actually supposed to be some meaning in the comparison.
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It means that "conservation" is related to "preservation" in the same way (or analogous way) as "conserve" is related to "jam". "conserve" and "jam" are both words for a kind of thick syrup made with fruit. I'm not sure if this is just meant as a jokey wordplay, or whether there is actually supposed to be some meaning in the comparison. More context would be useful.