名詞 tail fin:

1. a stabilizer that is part of the vertical tail structure of an airplane
   同義詞：vertical stabilizer, vertical stabiliser, vertical fin, tailfin
2. one of a pair of decorations projecting above the rear fenders of an automobile
   同義詞：tailfin, fin
3. the tail of fishes and some other aquatic vertebrates
   同義詞：caudal fin

1. The fish's tail fin was hurt.
   這條魚的尾鰭受傷了。