阐述两个要点间的联系
-As I said earlier/before...
-You will recall that earlier I said...
-You may have been wondering why I said...
-When I was talking about this point earlier I said...
-In my introduction I said...
-Five minutes ago I said...
-You may have noticed that...
-I mentioned earlier that...
-Let me pick up a reference made earlier to...

总结
-To summarize...
-Briefly, then...
-We have seen that...
-the main points, therefore, are...
-If I can summarize what I have said so far...
-If we can take stock for a moment...
-Thus we can see...
-It must now be clear that...
-I've been attempted to explain here that...
-So, to sum up...
-To recap, then, ...

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