1) 先后次序关系：at this time; first; second; at last; next；previously; simultaneously; eventually；last but not least；to begin with；to start with；to end with；finally；seeing...；since then；first of all；afterwards; following this; preceding this. 2) 因果关系：because；because of this；being that；another important factor／reason of... ； since； a
however 然而 moreover 另外 actually 事实上 As you know 正如你知道的for example/instance 例如 in addition 另外 not to mention 更不用说(表递进）in conclusion(总之）你可以在文章最后一段用 no doubt 毫无疑问By the way顺便提一下 n
