Let‘s take cars for example. They not only pollute the air in cities， but make them crowed. Furthermore， they cause a lot of traffic accidents. The noise made by cars disturbs the residents living on both sides of streets all day and night.
6. It is generally believed that 。.. accepted
引證觀點的常用句型。我們看看下面的例文是怎么使用這個句型的：
人們普遍認為，在發(fā)達國家人口增長的主要原因與其說是出生率的上升，還不如說是由于醫(yī)療保健的改善的使死亡率下降了。
It is generally believed that the chief reason for the increase in population in developed countries is not so much the rise in birth rates as the decline in death rates as a result of the improvement in medical care.
6. It is generally believed that 。.. accepted
引證觀點的常用句型。我們看看下面的例文是怎么使用這個句型的：
人們普遍認為，在發(fā)達國家人口增長的主要原因與其說是出生率的上升，還不如說是由于醫(yī)療保健的改善的使死亡率下降了。
It is generally believed that the chief reason for the increase in population in developed countries is not so much the rise in birth rates as the decline in death rates as a result of the improvement in medical care.