“圆满结束”常见的英文表达有 come to a successful/satisfactory/happy conclusion、end successfully/satisfactorily/on a high note 等。以下为你详细介绍：
come to a successful/satisfactory/happy conclusion
含义：表示事情发展到一个成功、令人满意或愉快的结局，强调整个过程和最终结果都符合预期，是比较正式、书面的表达。
例句：
The negotiations finally came to a successful conclusion after months of hard work.（经过数月的努力，谈判终于圆满结束。）
The project has come to a satisfactory conclusion, meeting all the original objectives.（项目已圆满结束，达到了所有最初设定的目标。）
end successfully/satisfactorily/on a high note
含义：更侧重于描述事件最终以成功、令人满意或美好的方式收尾，常用于日常交流或较为轻松的语境。
例句：
The sports meeting ended successfully with all the athletes giving their best performances.（所有运动员都发挥出了最佳水平，运动会圆满结束。）
The concert ended on a high note, leaving the audience with unforgettable memories.（音乐会以一个高潮圆满结束，给观众留下了难忘的回忆。）
wrap up successfully：“wrap up”有“完成，结束”的意思，“wrap up successfully”表示成功完成某事，达到圆满结束的状态。
例句：We wrapped up the conference successfully, and everyone was pleased with the outcomes.（我们成功结束了会议，大家都对结果感到满意。）
reach a successful/satisfactory finale：“finale”意为“结局，终曲”，“reach a successful/satisfactory finale”表示达成一个成功或令人满意的结局，常用于描述活动、事件等的结束。
例句：The festival reached a satisfactory finale with a grand firework display.（节日以盛大的烟花表演圆满结束。）