There is a new problem involved in the popularity of private cars that road conditions need to be improved.
involved in the popularity of private cars为前面problem的定语.此句为过去分词做定语.
that引导的是a new problem的同位语, road conditions 和后面的部分对problem进行解释说明.
There is a new problem involved in the popularity of private cars that road conditions need to be improved.
involved in the popularity of private cars为前面problem的定语.此句为过去分词做定语.
that引导的是a new problem的同位语, road conditions 和后面的部分对problem进行解释说明.