English Dictionary

porcupine

/ˈpɔː(ɹ)kjʊˌpaɪn/

noun

Any of several rodents of either of the taxonomic families Hystricidae (Old World porcupines) or Erethizontidae (New World porcupines), both from the infraorder Hystricognathi, noted for their sharp spines or quills, which are raised when the animal is attacked or surprised.

The porcupine climbed up the tree.

意味（1）

Any of several rodents of either of the taxonomic families Hystricidae (Old World porcupines) or Erethizontidae (New World porcupines), both from the infraorder Hystricognathi, noted for their sharp spines or quills, which are raised when the animal is attacked or surprised.

I have no evidence of grizzlies killing porcupines or vice versa. However, occasionally there is contact and sometimes a grizzly is injured or a porcupine killed, but the latter is rare.