“圆满结束”常见的英文表达有：
1、 Come to a successful/satisfactory conclusion
例句：The project has finally come to a successful conclusion after months of hard work.（经过数月的努力，这个项目终于圆满结束。）
2、 End successfully/satisfactorily
例句：The conference ended successfully, with all participants expressing their satisfaction.（会议圆满结束，所有与会者都表示满意。）
3、 Be brought to a successful/satisfactory close
例句：The negotiations were brought to a satisfactory close last week.（上周谈判圆满结束。）