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1·A road bridge has to carry a lot of traffic.

公路桥必须承载很多来往车辆。《牛津词典》

2·There's always a lot of traffic at this time of day.

每天这个时候总是有很多来往车辆。《牛津词典》

3·There is a lot of traffic here.

这里交通很拥挤

4·There is a lot of traffic in the street. Please drive carefully.

街上有很多车辆，请小心驾驶。

5·It can be noisy at night, and there is quite a lot of traffic during the day.

晚上会很吵，白天车辆也相当多。

6·A lot of teenagers in my town bike everywhere, but it's very dangerous because there is a lot of traffic.

我镇上的很多青少年都是骑着自行车到处跑，但这是非常危险的，因为交通十分繁忙。

7·There's a lot of traffic jams.

这里有很多交通堵塞的状况。

8·There's a lot of traffic fumes.

有很多汽车尾气。

9·There was a lot of traffic.

交通太拥挤了。

10·There was a lot of traffic on the highway.

公路上的交通流量很大。