You must display your knowledge of different approaches and make the situation that your strategy is among the most appropriate and most legitimate way to deal with your investigate problem. 不要为了完成演讲而演讲. 时间如果不够, 自己根据情况删减, 挑选重要的去讲, 但也要保证口齿清晰, 语速放慢, 让别人