基本解釋原睡物類同根派生 protochordates相關(guān)詞英漢例句These characteristics are shared by brachiopods and pterobranchs (a hemichordate group) as well as by echinoderms, protochordates, amphioxus, and vertebrates. 脊索動物的祖先可能類似尾索動物的幼體，后向兩個方向發(fā)展，一是經(jīng)過變態(tài)，成體為固著生活，具鰓裂作為取食和呼吸器官；protochordates更多例句