虽然它只在春天开一次花，但花谢之后，茂盛的绿叶点缀着屋后的单调;给我们带来不少慰藉。
O O B-Thing O O B-Time I-Time O B-Thing I-Thing I-Thing O O B-Thing B-Time I-Time I-Time O O O O B-Thing B-Time O O O B-Location I-Location O O O O O B-Person I-Person O O O O O O O