时间顺序Time-Sequence:first, later, next, finally, before, after, now, previously, last, then, when, immediately, formerly, subsequently, presently, initially, ultimately meanwhile

　　举例Examplef:or example, such as,for instance, illustrate

　　列举Enumeration:and, too, finally, furthermore, first(ly), second, third, last, another, next

　　补充Continuation:also, in addition, and,further, another, as well as

　　比较或反差Comparison or Contrast:

　　比较类like, likewise, as, similarly, at the same time,as well as, both, all,in comparison,

　　反差类 on the other hand,in contrast, despite,nevertheless,yet, instead,rather, notwithstanding,though, regardless, unlike,although, even though,whereas but, in spite of,on the contrary, however

　　强调Emphasis:important to note, most, above all, especially valuable, a central issue, especially relevant, should be noted, the most substantial issue, remember that, a major event,the principal item, pay particular attention to, the chief factor, most of all, a significant factor, a primary concern, a key feature, the main value

　　因果Cause-Effect:because, accordingly,for this reason, hence, resulting, as a result, o, then, thus, therefore, since, consequently

　　总结Summary:thus, in short, to conclude, in brief, in the end, in summary, to reiterate, in conclusion, to sum up, finally, therefore, thus, as already stated define, is defined as, known as, that is, the term means, we mean, we can state, we refer to