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婉谢邀请信函DearSirs，MywifeandIwereverygratefultoreceiveaninvitationtoattendthecelebrationsmarkingtheopeningofyournewfactory．Wearesorrytoinformyouthatwehavetodeclineyourinvitationowingtoapreviousengagement．Yoursfaithfully，中文对照敬启者：我和夫人非常感谢阁下邀请参加贵公司新建工厂开业典礼庆祝仪式。但由于事先有约，无法应邀前来参加，深表遗憾。×××敬上更多范文，敬请登陆范文大全网（fanwen.glzy8.com）！