In addition,changes made to the construction codes in Los An

In addition,
changes made to the construction codes in Los Angeles during the last 20 years have strengthened the city’s buildings and highways, making them more resistant to quakes. made to the construction codes 这是过去分词作后置定语，，，怎么翻译呢，，， 换成现在分词坐定语，，又是怎样，，