party-line bus

例句：

1. 1.The party-line bus is a popular mode of transportation in our city.
   党派线公交车是我们城市一种受欢迎的交通工具。
2. 2. The party-line bus service is essential for the elderly who need to travel long distances.
   党派线公交车服务对于需要长途旅行的老年人来说是必不可少的。
3. 3. The party-line bus has become a symbol of modern transportation.
   党派线公交车已经成为现代交通的象征。