湛蓝的天幕下，几片白云从北方飘来，如绢如絮，缓缓滑过我的头顶，挂在西南的天际。
O O O B-Thing I-Thing O O O O B-Thing I-Thing O B-Location I-Location O O O O O O O O O O O O B-Person O B-Thing I-Thing O O O B-Location I-Location O B-Location I-Location O