Grammar has a hierarchical, nested structure involving units within other units.

语法有嵌套的层级结构，语言单位当中又有其他语言单位。

And indeed, LLMs seem to learn nested, hierarchical grammatical structures, even though they are exposed to only linear input, ie, strings of text.

事实上，虽然大型语言模型只接触了线性的输入内容，即文本字符串，但它们似乎学会了嵌套的层级语法结构。

They can construct sophisticated nest structures in any urban environment like these populations in Miami and Barcelona.

它们可以在任何城市环境中建造复杂的巢穴结构，就像迈阿密和巴塞罗那的这些种群一样。