今夜闹市区交通繁忙。

There is heavy traffic in the downtown area tonight.

《牛津词典》

然而，在汽车交通繁忙的地区，种子在没有火灾的情况下借助汽车尾气提供所需的二氧化氮发芽。

In areas with heavy automobile traffic, however, the seed germinates in the absence of fire, with automobile exhaust supplying the required nitrogen dioxide.

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通常因交通繁忙而堵塞的道路却被烟雾所堵塞。

Roads that are usually choked with traffic were choked with smoke instead.

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