去年暑假,我到乡下去探亲。有一天傍晚,天气很闷热,我去厨房倒开水,忽然发现墙壁下面,有几只蛞蝓正在墙上爬来爬去,留下一组组透明丝迹。“蛞蝓为什么向墙上爬?它们是从哪里来的?……”这些大问号不断地浮现在我的脑海里。为了解开这个谜,我问了问姥姥,姥姥笑嬉嬉地对我说:“一 Last summer vacation, I went to the country to visit relatives. One evening, the weather was very hot and I went to the kitchen to pour boiling water. Suddenly I found several crickets crawling up and down the wall, leaving a group of transparent silk traces. “Why did you climb on the wall? Where did they come from?...” These big question marks came to my mind. In order to solve this mystery, I asked a question and asked me: "I