"Score is not equal to knowledge," my head teacher always keeps telling me this, because he wants us to master all the knowledge we need to understand. I do not put his word in mind, because in my heart, score comes the first. One day, chemistry teacher taught us some knowledge and then asked us to finish a paper test. Whoever passed the text can do the experiment. I got a high mark by guessing. I was very happy, but tragedy happened. I made a small explosion by not mastering the knowledge. I was scared and finally understood the sentence," Score is not Equal to Knowledge."