(from the comparison between these positive and negative effects of a,negative ones. therefore,这种题型往往要求先说明一下现状,有时也会单从一个说明利弊题型,2. 事物本身的优缺点(或一方面) its advantages can be seen as follows. first ----------------(a的优点之一). besides -------------------(a的优点之二).the