This sentence conveys the beauty and vitality of the grassland and expresses praise for the grassland.
The beauty of the grassland: By emphasizing the beauty of the grassland, it shows that the grassland has charming natural scenery, such as vast grasslands, blue sky and white clouds, clear rivers, etc.
The joy of the grassland: The grassland is a joyful world, which means that the grassland is full of vitality and vitality. There may be various animals running and playing on the grassland, or people holding various activities on the grassland, such as horse racing, singing and dancing, etc.