理解元语言对高级语言学研究至关重要。

Understanding metalanguage is crucial for advanced linguistic studies.

元语言：为分析和描述某种特别研究的语言学符号和术语。

Metalanguage: certain kinds of linguistic signs or terms for the analysis and description of particular studies.

元语言: 为分析和描述某种特别研究的语言学符号和术语.

Metalanguage : certain kinds of linguistic signs or terms for the analysis and description of particular studies.