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单词 微化石
例句 DEFINITIVE EXAMPLES 权威例句〔conodont〕A Paleozoic microfossil usually having a toothlike shape and considered to be the remains of an extinct marine organism.牙形刺:一种古生代微化石,一般有牙状形体,被认为是一种已灭绝海生生物体的残骸美国传统〔nannofossil〕A very small fossil organism, especially one of the nannoplankton.微化石:一种非常小的化石生物体,尤指浮游生物之一美国传统
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