This is the 7188th most frequent Chinese word.
精通
Mastery; proficiency.
Here, '精通' is used to indicate mastery or high proficiency in specific subjects, in this case, languages.
她精通法语和西班牙语。
She is proficient in French and Spanish.
In this sentence, '精通' signifies the act of thoroughly studying and mastering a specific area of knowledge for a purpose.
为了讲好这一话题，他精通了相关历史。
To present the topic accurately, he mastered the relevant history.
Here, '精通' describes someone's expertise or deep understanding of a field, highlighting their capability and knowledge.