This podcast looks at language for reports. As with other formulaic language (e.g. the language for presentations), you do not need to learn all of these phrases. You should be able to use at least one phrase for each function (e.g. stating the aim(s) of your report, referring to figures in the Results section or the Discussion section). How many more you learn after this is up to you. Good writing requires varying the expressions you use, rather than using the same ones all the time. On the other hand, you will only state the aim once in a report, so one phrase may be enough for life!