求翻译：1971年至1983年，每年的10月1日，北京都以大型的游园联欢活动等其他形式庆祝国庆，未进行群众游行。1984年，国庆35周年，举行了盛大的国庆阅兵和群众庆祝游行。在此后的十几年间，均采用其他形式庆祝国庆，未再举行国庆阅兵式和群众庆祝游行。1999年10月1日，国庆50周年，举行了盛大国庆阅兵和群众庆祝游行。这是中华人民共和国在20世纪举行的最后一次盛大国庆庆典。是什么意思？

1971-1983, October 1 each year, Beijing is to a large gathering of walkers and other forms of celebrating National Day, not for mass demonstrations. In 1984, the 35th anniversary of National Day, held a grand military parade and mass to celebrate the National Day parade. Over the next ten years, oth

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From 1971 to 1983, every year on October 1, Beijing all by large-scale visited a park celebration and so on other form celebration National Day, has not carried on the populace to parade.In 1984, National Day the 35th anniversary, held the grand National Day to review troops with the populace celebr

From 1971 to 1983, October 1 of each year, the large garden, at the Beijing gathering other forms, such as national day, without mass rallies. In 1984, the 35 anniversary of national day, held a grand national day military parade and mass celebration parade. After a dozen years, are made of other fo

From 1971 to 1983, October 1 of each year, the large garden, at the Beijing gathering other forms, such as national day, without mass rallies. In 1984, the 35 anniversary of national day, held a grand national day military parade and mass celebration parade. After a dozen years, are made of other fo