【正文】
要說明原因或理由,可用如下兩種套路的任何一種。 套路 When we/ you ., we/ you will be faced with the choice between A and B. Before making the right choice, we/you had better make a close parison and contrast of them. First of all, A... Also, B ... Second, A ... Likewise, B ... Despite their similarities, A and B are also different in the following aspects. First, A ... However, B... Besides, A... On the contrary, B... Therefore, it depends which... we/you should choose. If we/ you... . we/you should choose A。就用下面這個套路吧。例如:運動的積極因素與消極因素、雙休日的好處與負作用、新的科學技術(shù)給社會帶來的好處與問題、摩