The traffic was very heavy.

交通非常拥堵。

Go past the traffic lights.

经过红绿灯。

Cross the road at the traffic lights.

在红绿灯处过马路。

I missed the traffic lights in Melbourne.

我怀念墨尔本的交通灯。

I must pay attention to the traffic lights!

我必须注意交通信号灯！

You must pay attention to the traffic lights.

你必须注意交通信号灯。

The traffic is always the worst in the capital city.

交通在首都总是最糟糕的。

Do we have to cross the road at the traffic lights?

我们必须在红绿灯处过马路吗？

The traffic is always bad, not to mention the air pollution.

交通总是很糟糕，更不用说空气污染了。

We do our best to help the traffic police keep everyone safe.

我们尽力帮助交警确保每个人的安全。