There are inflections called " cases" on the end of nouns -- (Laughter) that tell you who does what to whom in a sentence.

名词末尾有被称为“”折变化——（笑声）它们告诉你句子中谁对谁做什么。

Now cases can be a bit complicated but the result of this one is that a person's name can differ depending on whether you're speaking to them

现在变化可能会有，但这种变化结果是，一个人名字会根据你是直接对他们说话还是在谈论他们而有所不同。