well-said:
utilizes various tone of voice, pauses and stresses depending on the situation, the environment, the mood and the intention of the speaker at the moment of communicating.
例如:
同样这个句子:Some birds are flying over /head?
用一般的音调(声频:PITCH)来读, 意思就是:一些鸟在头上飞吗?,而用高频(higher pitch),这句就可能表示惊讶,而不是问句了。