老师要我们写一篇关于爷爷奶奶的作文,这勾起了我一段痛苦的回忆。这是发生在我5岁时的一件事。那年夏天,奶奶带我去老家江西看望她的妈妈。列车上,我高兴得又是跳又是笑,奶奶说:“靖至,你真是幸福啊!”说着,叹了一口气。我望着奶奶严肃的样子,不解地问:“奶奶,您怎么叹气啊?” The teacher asked us to write an essay about grandparents, which aroused my painful memories. This is what happened when I was 5 years old. That summer, my grandmother took me to her hometown in Jiangxi to visit her mother. On the train, I am happy to be jumping and laughing, my grandmother said: “Jing to, you are so happy ah!” Said, sighed. I looked at her grandmother seriously, puzzled and asked: “Grandma, how do you sigh ah?”