The actual fluctuation of your voice isn't something that's taught, but what they teach you is how to pronounce the letters properly, and rules that go along with the letters.

你声音的起伏不是别人教的,但是他们教会你的是,字母的正确发音，以及这些诵读这些字母的规则。

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and they don't remember the rules, but they just know it sounds right.

他们并不知道什么规则，就是知道那样听起来才正确。

韩国人经常犯的失误 - SpeakingMax英语口语达人

So, presumably, if we follow our rules so far only one of these should be correct.

那么，可以假定，如果我们按照之前的规则,应该只有一个是正确的。

麻省理工公开课 - 化学原理课程节选