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Graptolite的音标发音
Graptolite
英式发音：[grptlait]
美式发音
(n.) One of numerous species of slender and delicate fossils, of the genus Graptolites and allied genera, found in the Silurian rocks. They belong to an extinct group (Graptolithina) supposed to be hydroids.
手打:洛伊斯
