许多树叶都被吹进管道，造成堵塞。
Many leaves have been blown down into the pipe, and have blocked it.
如何造成堵塞喷嘴？
高速公路因发生事故造成堵塞时，可在右侧紧急停车带或路肩行驶。
When an accident has caused congestion on an expressway, the vehicles may run in the emergency strip on the right or in the shoulder of the road.
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