英语词汇“筆石”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	筆石
释义	筆石 bǐ shí古代的一種體內有骨骼的無脊椎動物，形體很小，生活在平靜的海洋中，構成羽毛狀或鋸齒狀的羣體。頁巖中常有它的化石，是劃分和對比地層的重要化石之一。
随便看	social casework social case work social caseworker social case worker Socialcast social categorization social categorization hypothesis social categorization theory social category social catering social causality social causation social cause social cause of formation social causes social center social centre social centre subjects social ceremony and rites social chamber social chameleon social change social-change Social Change Model social changes