1. Do you know why the traffic is so heavy?

你知道交通为什么这么拥堵吗?

2. There is too much traffic on the road.

这条路上行人车辆太多了。

3. A lorry overturned on the road and blocked it, so all the traffic was held up.

一辆货车在路上翻车了，堵了路，所以交通被阻塞。

4. Yesterday the traffic was held up for hours by a terrible accident on this stretch of the motorway.

昨天一起惨重的交通事故给这一段快速公路造成了几个小时的交通阻塞。

5. Traffic was interrupted by a dense fog.

交通因浓雾而受阻。

6. Heavy snow is blocking all roads into Scotland.

大雪阻塞了所有通往苏格兰的道路。

7. The accident blocked traffic in the town centre.

事故阻塞了市中心的交通。