passing loop

例句：

1. 1. The passing loop is a crucial part of the traffic system.
   过路的循环是交通系统的重要组成部分。
2. 2. The loop circulation helps to maintain the cleanliness of the air.
   循环流通有助于保持空气的清洁。
3. 3. The loop transit allows for efficient movement of goods and people through the city.
   循环通行使货物和人员能够高效地穿过城市。