dorsal longitudinal fasciculus

例句：

1. 1.The dorsal fin is the main fins of a fish.
   鱼的背鳍是主要的鳍。
2. 2. The dorsal fin helps the shark to swim upright.
   背鳍帮助鲨鱼垂直游泳。
3. 3. The dorsal fin is visible in many marine species.
   许多海洋物种都有背鳍。
4. 1. The longitudinal axis of the Earth runs through its core.
   地球的纵轴穿过其核心。
5. 2. The longitudinal section of the tunnel shows the construction process.
   隧道的纵向剖面展示了建造过程。
6. 3. The longitudinal growth of the plant is measured by its height.
   植物的纵向生长通过其高度来衡量。
7. 1. The fasciculus is made from silk and has a soft texture.
   该束是由丝绸制成的，质地柔软。
8. 2.The fasciculus was used to hold the pages together.
   该束用于将页面固定在一起。
9. 3. The fasciculus was wrapped around the tree trunk to protect it from damage.
   该束被缠绕在树干上以保护它免受损害。