About this time, you're coming to the point where you may be wondering, what exactly are the mechanics of intonation? What changes when you go to the top of the staircase or when you put stress on a word? There are three ways to stress a word.
+ The first way is to just get louder or raise the volume. This is not a very sophisticated way of doing it, but it will definitely command attention.
+ The second way is to streeeeetch the word out or lengthen the word that you want to draw attention to (which sounds very insinuating).
+ The third way, which is the most refined, is to change pitch. Although pausing just before changing the pitch is effective, you don't want to do it every time, because then it becomes an obvious technique. However, it will make your audience stop and listen because they think you're going to say something interesting.

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太长了

说的不好我也练一下