今天，当我高高兴兴地回家时，一走进楼梯，就忍不住皱起了眉头，想：这楼梯怎么这么脏？到处都是烟蒂和纸屑，我决定来扫一扫楼梯。
Today, when I came home happily, I could not help frowning as soon as I walked into the stairs, thinking: why is the stairs so dirty? With cigarette butts and scraps of paper everywhere, I decided to sweep the stairs.
一到家，我立刻拿起扫把冲上六楼开始扫。我一级一级地扫着，越到下面的时候那垃圾就越多，最后我拿着簸箕把垃圾扫进去。
As soon as I got home, I picked up the broom and rushed up to the sixth floor. I sweep level by level, the more rubbish there is when I get to the bottom, and finally I sweep the rubbish in with a dustpan.
扫完了，我回到家，妈妈问我：“你的裤子怎么这么脏呀？”我说：“我站在下面扫的呗！”妈妈说：“难怪这么脏，你应该站在上面向下扫的呀！”原来，扫楼梯也有学问呀！
When I got home, my mother asked me, "Why are your pants so dirty?" I said, "I'm standing down and sweeping!" Mother said, "no wonder it's so dirty. You should stand on it and sweep down!" It turns out that there is knowledge in sweeping stairs!
虽然我的裤子变脏了，但是楼梯变得干干净净，我心里美滋滋的。
Although my trousers are dirty, the stairs are clean and my heart is happy.
