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[measure the sea with an oyster shell—have a shallow understanding of a person or subject;shortsighted] 即蠡酌。以瓠瓢测量海水。比喻见识短浅,以浅见量度人,“以蠡测海”的略语 以蠡测海。——《汉书·东方朔传》 蠡测管窥
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