常见例句Having a urochord. 有尾索的primitive marine animal having a saclike unsegmented body and a urochord (a notochord) conspicuous in the larva. 有囊状不分段形状身体的原始海洋动物，幼虫阶段有明显的脊索。urochord. 尾索，尾索动物 返回 urochord