【正文】
persistance we have as we encounter new experience and unexpected obstacles. Take myself as an example I changed my major when I became a postgraduate. After the choicedays have been harsh for cannot understand the new lessons at all. For they are closely related to mathmatics which I learned nothing about before. However wuth the belief that this is the great chance for me to experience new ideas and challenge myselfI persisted. I asked for help from every channel and reorgonized my life. Gradually I could understand some parts and even found maths I learned to act instead of plaining. In retrospectthe choice left no trace in my mind but the happiness and bitterness of the past four months bees an unforgetable experi