The index of patch density of wetlands of all the types increased, with that of reed swamps ranked first, being 18.507, and that of mudflats second, being 6.879 in 2005.是什么意思_The index of patch density of wetlands of all the types increased, with that of reed swamps ranked first, being 18.507, and that of mudflats second, being 6.879 in 2005.在线翻译_英语_读音_用法_例句