trailgate

例句：

1. 1. The trail was blocked by a large boulder.
   小径被一块大石头堵住了。
2. 2. The police found the trailgate and arrested the thief.
   警察找到了路障并逮捕了小偷。
3. 3.The hikers had to backtrack and find another way through the trailgate.
   徒步旅行者不得不回头重新找到通过路障的路线。