" The analytical tools and techniques required for this are still being developed, " Vethaak says.

“为此所需的分析工具和技术仍在开发中，”维塔克说。

In attempts to establish the universal rules of grammar, Chomsky developed an analytical tool known as generative syntax, which represents the order of words in a sentence in hierarchical syntax trees that show what structures are possible.

为了建立通用的语法规则，乔姆斯基开发了一种称为生成句法的分析工具， 它在分层句法树中表示句子中单词的顺序， 显示哪些结构是可能的。