障碍赛

例句：

1. 1. The car was stuck in the trafficjam for over an hour.
   汽车在交通堵塞中被困了超过一个小时。
2. 2. The climbup the mountain was a real obstacle toour progress.
   爬山对我们来说是一个巨大的障碍。
3. 3. Theroad was blocked by a large tree fallingdown.
   道路被倒下的大树阻挡了。