enumerating: there are four parts, there are several methods we usually adopt, summarizing: in conclusion / let me briefly recap on, in a nutshell, introducing an example: such as / to illustrate this, for example / for instance , indicating a contrast: while / on the contrary, in contrast / on the other hand, moving to a new topic: let's move on to / turn to, about the next topic, sequencing information: finally / before that / the second, first of all / after that / before that, outlining lecture structure: I'll begin with / my intention, what I am going to talk today is,

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