英语词汇“pith ball”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	pith ball
释义	pith ball noun A small ball of pith (usually from a tree), especially one hanging from a thread in an electroscope, which is attracted or repelled by an electrostatically charged object. Origin Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London.
随便看	blue on blue Blue Orchid blue paper blue-pencil blue penguin blue perch Blue Peter blue pigeon blue pike blue pill blue pipe blue plaque blue plate bluepoint blue pointer blue poppy blue pot blueprint blueprinter blue process blue quail blue racer blue riband blue ribbon Blue Ribbon Army

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pith ball