摘要：
correspondingly…similarly…conversely…ontheotherhand…likewise…while…whereas…notwithstanding... correspondingly… similarly…
conversely… on the other hand…
likewise… while…
whereas… notwithstanding…
conclusion（表明做结论的）
to sum up …
in summary …
to
summarize …
in conclusion …
to conclude …
finally …
in other words …
as we have seen ..
therefore …
thus …
