求翻译：2011西安世界园艺博览会以生态文明为引领，以”天人长安，创意自然”为主题，将营造以植物为主体的自然景观，构建世界化的园林建筑背景，彰显西安历史文化和地域特色韵味，展示人类与自然，城市与自然和谐共生的新理念和新创意，探索人、城市、园林、自然和谐共生的未来发展模式。是什么意思？

2011 Xi'an World Horticultural Exposition for the lead to ecological civilization "Heaven Chang'an, Creative Visions of Nature" as its theme, will create a natural landscape, plant to build the world of landscape architecture background, highlighting the history, culture and regional characteristics

Xi'an International Horticultural Exposition in 2011 for ecological civilization lead to " days Chang'an, the creative person natural" as the theme, as the main body of the plant will create a natural landscape, and to build a world of Landscape Architecture background, exemplifying the Xi'an histor

2011 Xi'an world gardening exposition as will eagerly anticipate take the ecology civilization, take” beauty Chang An, the creativity nature” as the subject, will build take the plant as the main body natural landscape, the construction world botanical garden construction background, clear will reve

2011 Xian world gardening Expo to ecological civilization for led, to "Heaven Changan, creative natural" for theme, will create to plant for main of natural landscape, construction world of of garden building background, show Xian history culture and geographical features charm, show human and natur