过硬 (guò yìng): มีความเชี่ยวชาญที่สมบูรณ์แบบของ sth

In order to pass this assessment, he practiced pronunciation and grammar every day, and finally developed excellent Chinese.

This surgeon has excellent skills; even when encountering a complicated operation, he can complete it calmly and steadily.

When recruiting, the company particularly values whether applicants have solid English communication skills, because the business requires frequent interaction with foreign clients.