1)表層次:
    first／firstly ／to begin with ／in the first place
    second／secondly／furthermore
    third／thirdly／what is more／besides
    in addtion ／finally
    2)表轉(zhuǎn)折:
    by contrast ／although ／though／ yet
    at the same time ／but
    despite／the fact that
    even so ／in contrast
    nevertheless ／even though
    for all that ／notwithstanding
    on the contrary／ however in spite of
    on the other hand ／otherwise
    instead ／still ／regardless
    3)表因果:
    therfore ／consequently
    because of／ for the reason
    thus／ hence ／due to
    owing to ／so ／accordingly
    thanks to ／on this account ／since ／as
    on that account ／in this way ／for ／as a result
    as a consequence
    4）表讓步：
    still ／nevertheless／in spite of ／all the same
    of course ／despite ／even so ／after all
    5)表遞近：
    furthermore ／moreover ／likewise ／what is more
    besides ／also ／not only……but also……
    too／ in addtion
    6)表舉例：
    for example／ for instance
    for one thing／ that is
    to illustrate as an illustration
    a case in point
    7)表解釋：
    as a matter of fact／ frankly speaking
    in this case ／namely
    in other words
    8)表總結(jié)：
    in summary ／in a word ／thus ／as has been said
    in brief ／in conclusion ／altogether／in other words
    to conclude／ in fact／finally／ in simpler terms
    indeed／ in short ／in particular
    that is ／in other words ／of course ／on the whole
    namely ／in all／ therefore ／to summarize