for one thing…for another
3. 表示增补、递进：not only…but also, first, second, third, moreover, furthermore, in addition, additionally, even, besides,
4. 表示转折：but, however, nevertheless, in contrast, though, instead, in spite of, though, although, on the other hand, whereas, on the contrary, while, regardless of, by contrast
5. 表示因果：so, thus, therefore, hence, because, since, as, for, as a result, consequently, lead to, attribute to, contribute to, result in , result from, cause, as the result of…, due to, owing to, thanks to
6. 表示总结：in a word, in summary, to conclude, in conclusion, in closing, in short, to sum up
7. 表示时间：first, soon, then, next, later, after, before, eventually, finally, meanwhile, now, in the future, at the same time
8. 表示目的：so as to, in order to, in order that, so that, for the purpose of
9. 表示解释：in other words, similarly, namely, that is, that is to say, likewise
