participation      
noun [ U ] uk/pɑːˌtɪs.ɪˈpeɪ.ʃən/ us/pɑːrˌtɪs.əˈpeɪ.ʃən/
 参加,参与
the fact that you take part or become involved in something
 - More examples
 - Your participation in this investigation is vital.
 - Full participation by all members is compulsory.
 - It would be encouraging to see participation by all age groups.
 - A leg injury is preventing him from active participation in the competition.
 - His participation in religious activities was seized upon by the media.