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单词	univalve
释义	univalve /ˈjuːnɪvalv / Zoology adjective Having one valve or shell.In the earliest Cambrian, one lineage developed a bivalved mineralized shell (Fordilla and its relatives), the other an endogastric univalve shell (the Helcionellids).... Vetustovermis bears a number of morphological features that are found in Kimberella, which has been interpreted to have a non-mineralized but stiff univalve shell. noun another term for gastropod.Thus, all rostroconches and some helcionellacean univalves technically become stem group bivalves.... Now explain how a univalve differs from a bivalve, in more ways than just the number of shells. But who speaks out for the univalve and the bivalve?
随便看	four flush four-flusher fourfold four-four time four freedoms four-handed four hundred Fourier analysis Fourierism Fourierist Fourier, Joseph Fourier series Fourier transform four-in-hand four-leaf clover four-leaved clover four-legged friend four-letter word four noble truths four-o'clock four o'clock plant fourpenny fourpenny one four-ply four-poster

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。