car cycle

例句：

1. 1. The car cycle is a crucial part of the traffic system.
   汽车循环是交通系统的重要组成部分。
2. 2. The new car cycle has greatly improved the efficiency of transportation.
   新的汽车循环大大提高了运输效率。
3. 3. The car cycle is a popular mode of transportation for people in cities.
   汽车循环是城市居民常用的交通工具。