straight tail

例句：

1. 1. The dog has a straight tail thatis always wagging.
   那只狗有一条直尾巴，总是摇来摇去。
2. 2. Thecar had a straight tail and was veryfast.
   那辆车有一条直尾巴，跑得很快。
3. 3. The cat's tail isstraight and long.
   猫的尾巴是直的并且很长。