Commissura habenularum

例句：

1. 1.The surgeon used a habenularum to suture the wound.
   外科医生用一个钩状物来缝合伤口。
2. 2.The octopus had a habenularum on its tentacles.
   章鱼的触手上有钩状物。
3. 3. The scientist discovered a new type of habenularum in the ocean.
   科学家在海洋中发现了一种新的钩状物。