They are bilateral symmetrical animals with a triploblastic body plan.
它們是三胚層體制的兩側(cè)對稱.
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Chordates are bilaterally symmetrical, triploblastic segmented coelomates which demonstrate a deuterostomic pattern of early embryonic development.
脊索動物兩側(cè)對稱 、 胚層,分節(jié)的體腔,在胚胎發(fā)育的早期過程中,顯示為后口類型.
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