dorsalia背片dorsaladj.(动物）背的；背部的；背侧的dorsal digital nerves指背神经dorsal fascia of foot足背筋膜dorsal turbinate bone背侧鼻甲骨dorsal digital artery指背动脉dorsal margin of ulna尺骨背缘, 尺骨后缘dorsal artery of nose鼻背动脉dorsal muscles needle背肌针Dorsal root ganglions背根神经节Dorsal thoracic nerve胸背神经dorsal spinal radicle脊神经后支阻滞

1. All gill filaments have the same structure.
   所有鳃丝的组织结构均相同。
2. The anterior part of a fish contains the head and gill.
   鱼的前部包括头和鳃。