cephalo-

例句：

1. 1.The cephalopods are a group of mollusks that have a unique structure for their heads.
   头足纲是一类具有独特头部结构的软体动物。
2. 2. Cephalopods are found in the oceans and play an important role in marine ecosystems.
   头足纲在海洋中被发现，对海洋生态系统起着重要作用。
3. 3. The cephalopods have been used in traditional medicine for centuries due to their unique properties.
   由于其独特的性质，头足纲在传统医学中被使用了数百年。