一次难忘的经历用英语怎么说？

An Unforgettable Experience

Everyone has some unforgettable experiences. I will never forget my first volunteer work.

Last summer, our class went to a country primary school to help the students there. First, we gave away some books and stationery to them. Then we talked about school life. I was quite shy before, but to my surprise. I talked with some students for almost an hour without intermission. I shared my effective study methods with them excitedly. Finally, we played games together. All of us felt so happy.

By doing the volunteer work. I not only gained happiness, but also became more confident. It made me experience that giving is receiving.