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    蚍蜉撼大树 蚍蜉撼大樹

    pífúhàndàshù

    1. lit. an ant trying to shake a big tree (idiom); fig. to overrate one's own strength; also written 蚍蜉撼樹|蚍蜉撼树[pi2 fu2 han4 shu4]