Why we needs water

70% of the parts in our body is water. So water is very important in our live. From the water we get the oxsigen. Why we needs oxsigen? All of us know that we cannot live without oxsigen. Our brain also needs an oxsigen. Why student always feel sleepy and tired? When it happens they cannot concentrate in the class, so that they didn't understand what they are studying. All of this because of lack of oxygen. So as a conclusion, always bring the water to the class so that you can get more oxygen, more energy and more brilliant. Thats what chinese always do. Try it.