英语翻译由XXX和YYY共同举办的“ZZZ”竞赛活动,经过全国各地用户2个月的热情参与,取得了圆满成功.我很高兴代表YY

Jointly organised by the XXX and YYY " ZZZ " contest,after user 2 months of enthusiastic participation across the country,was a complete success.At this event,I am pleased（glad） to represent the YYY to warmly congratulate the achieved outstanding results in the user,but also on the active content providers and partners XXX heartfelt thanks!
仅供参考!