有时我们甚至用最大的声调和别人进行沟通。
Sometimes we even shout at the loudest of our pitches to communicate to people.
如果在一面镜子面前你能对这些规则进行练习的话，你将会感到更适应。当你练习的时候还要听到你的声调。
You'll be more comfortable if you practice these rules in front of a mirror. When you practice, you can also hear your tone of voice.
对声调的声学特征进行分析，得出调值的具体变化值，为普通话的测评和教学提供一个可供参考的标准。
The analysis for the tone's acoustic characteristics helps us gain the tone's accurate variations which can be used as a referendal standard for Putonghua's estimation and teaching.
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