今天下午，我在楼下的空地上学骑小单车。小单车是两个轮子的，好看极了。
This afternoon, I went to school and rode a bicycle in the open space downstairs. The bike has two wheels. It's very nice.
刚开始学骑单车时，我总是害怕摔倒，那时候还要有人在后面扶着。过了一会儿，我有一点会骑了，可还是害怕得心怦怦地跳。我暗下决心一定要学会骑小单车。
At the beginning of learning to ride a bicycle, I was always afraid of falling down. At that time, someone had to support me in the back. After a while, I could ride a little bit, but my heart pounded with fear. I made up my mind to learn how to ride a bicycle.
过了一段时间，我终于学会骑单车了。我非常开心，我欢快地骑着单车，心里一直当做后面还有人在扶着。
After a while, I finally learned to ride a bicycle. I am very happy, I ride a bicycle happily, in my heart, I always think there is someone behind me.
通过学骑单车这件事，我觉得不管什么事只要有信心，认真去做就一定能做好。
By learning how to ride a bicycle, I feel that no matter what you do, you can do it well if you are confident.