我的爷爷60多岁,别看他退休十几年了,可他一天也没闲着。社区里大大小小的事儿都少不了他,一天到晚总乐呵呵的。但是爷爷最近变了,变得闷闷不乐,常常望着一本书叹气,这是怎么回 My grandfather was in his 60s. Don’t look at him retire for more than ten years. But he was not idle any day. There are so many things in the community that he can’t miss him. He is always happy all day long. But Grandpa changed recently and became depressed. He often looked at a book and sighed.