Sometimes people drop the letter H, like when they say 'human, ' they say it 'uman.' Sometimes they especially emphasize the letter H, like the word 'what.' They would say 'hwhat.' What's up with that?

有时人们会省略字母 H，例如当他们说“human” 时，他们会说“uman” 。 有时他们会特别强调字母 H，例如“what” 这个词。 他们会说“hwhat” 。 这是怎么回事？