learning to swim

Learning to swim
A few weeks ago, I went to East Coast Park, where there is a big swimming pool. I did not know how to swim at all. I had learnt swimming in China, but never once could I get the idea of how to swim. However, when I saw the pool, I just cannot help wanting to jump into it.
When I really jumped into the pool, I found that the water was sea water and it smelt terrible when mixed with disinfectant. As it was sea water, I wanted to test whether I would float in it or not. Then I found that I floated! I told my friends that when I was in China, I never floated, and I thought it was because of the higher density of sea water that I could float here. They laughed at me and said that it was not a big deal if we compared the density of sea water and pure water. Then I thought maybe I gained fat here.
I found breaststroke the easiest to learn, or rather, easiest for me to keep floating. I had always thought that the force that pushed me forward should come from my pushing away water, and the harder I pushed, the further I would go. However, it did not work. I found myself struggle and stay at the same place all the time. “Why?” I began wondering. Luckily, some little girls who were also learning to swim helped me. I watched them and found that it was when the close their legs that they went forward fastest. I felt embarrassed as I had learnt physics for so many years, and I did not understand where the force came from. Then I tried the way these little girls used, and found myself move forward a few meters! I was so happy and swam all around the pool. After I cooled down, I decided to cover the whole distance without stop. When I reach the middle of the pool, I choked. I dared not give out breath under water and the time my head being above the water was too limited to complete an entire process of breathing. So, when I came to the middle there was no air in my lung. It was time to go, though I do not want to leave.
What a pity I left my learning half-done. However, it was a lot of fun. Besides, there was BBQ waiting for me.