Definition
To have mastered a skill or process to the point of being able to execute it with great efficiency and expertise.
轻车熟路（到家、炉火纯青）
She has got giving presentations down to a fine art, always hitting the key points and delivering them perfectly.
她已经将演讲掌握得非常熟练，总能精准地抓住重点并完美地呈现。
He's got cycling through the city traffic down to a fine art; he navigates the streets quickly and safely.
他已经将骑自行车穿梭在城市交通中掌握得非常熟练，能够快速且安全地穿梭于街道之间。
With years of experience, she has got time management down to a fine art, efficiently completing multiple tasks.
经过多年的经验，她已经将时间管理掌握得非常熟练，能够高效地完成多项任务。