精通 (jīng tōng): เพื่อให้มีความเชี่ยวชาญใน

She is proficient in three foreign languages, so she works at the Ministry of Foreign Affairs.

To become proficient in programming, you need a lot of practice.

He is proficient in Chinese history and is often invited to give lectures.

This chef is proficient in Sichuan cuisine; the dishes he makes are very spicy.