第1个回答 2008-10-04
take an active part in
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第2个回答 2008-10-04
play/take an active part in
active engagement
be active on本回答被提问者采纳
第3个回答 2008-10-04
take part in ..actively
join in voluntarily
第4个回答 2008-10-04
be actively involved in ...
take an active role in ...
第5个回答 2008-10-04
positively involved in...