What do you mean by proficient?

A comprehensive understanding is "communication and connection".

Have a thorough understanding of sth.

[Pinyin] ró ng huguà n t not ng

[Interpretation] Integration: Integration and understanding; Penetration: thorough understanding. Refers to the comprehensive knowledge and truth, get a comprehensive and thorough understanding.

By analogy, it suddenly becomes clear.

[antonym] Look at the words, eat them alive.

[Usage] Used as a compliment. Mostly used for study. Generally used as predicate, attribute and object.

[Structure] Combined type.

[Source] Song Zhuxi's "Zhu Zi Quan Shu": "Give inferences; Smell and know ten; It is the depth of scholars' efforts; Familiar with poverty; Then it can be integrated; So so. "