炉火纯青的英文：
[Literal Meaning]
stove/fire/pure/cyan
to alchemize pills till the flame in the stove to become cyan

[解释]
道士炼丹，炼到炉里发出青色的火焰就算成功了。比喻功夫或技艺已达到了精湛、纯熟、完美的境界。

[Explanation]
high degree of professional proficiency

[例子]
他的剑术已经炉火纯青，打败了很多著名的对手。

[Example]
His skill of fencing has reached a high degree of excellence and defeated many famous opponents.

complete mastery;Absolute purity
炉火纯青

Consummation of skill or learning
炉火纯青

They are impressed by the sheer professionalism of the performance.
他们赞佩表演炉火纯青。

Her singing was perfection.
她的歌唱得已是炉火纯青.

He attained the acme of perfection in landscape painting.
他的山水画的技巧达到了炉火纯青的地步。

He attained perfection in landscape painting.
他的山水画达到了炉火纯青的地步。

He refined the whole art of shuttle diplomacy.
他把穿梭外交艺术提高到炉火纯青的地步。

She said that Duse has leaden feet, and that the perfect actors walked on air
她说杜恩走起路来脚步沉重，而炉火纯青的演员却都步履轻盈，飘飘若仙。

After the age of 70, Huang began to form his own artistic style and reached a higher painting realm.
70岁以后，黄宾虹开始创立自己的风格，使艺术达到炉火纯青。