1.  What's more, Internet has added plenty of words to our lexicon, although some have yet to make the dictionary.

2.  In recent years, violent elements have been added into varieties of media, Internet websites, and electronic games on personal computers and other platforms, which are accessible to adolescents in daily life.

3.  ViViolent elements have been added to a variety of media, the network and computer games over the past years.

4.  Violent elements have been added to a variety of media, the network and computer games over the past years.