Well, I'm still feeling a little homesick and so many things seem strange to me.
噢,我还感到有点想家。而且这里的很多东西我还不习惯。
is as the proportion of the total vocabulary of his mother tongue against those words of his own baby talk that are taken up into the vernacular of his family.
就好像他本国语言的总词汇量和自己咿呀学语时他家庭所接纳的他的词汇量之比。