一挥而就 Done with a single stroke
Explanation
形容写字、写文章、画画等速度快、完成得迅速。
Describes the speed and efficiency of writing, painting or creating texts.
Origin Story
传说唐代大书法家颜真卿有一次去拜访一位朋友，朋友家客厅里摆着一张古琴。颜真卿看到古琴就想起了自己儿时学琴的经历，于是提笔在纸上写了一首诗，诗中表达了对琴艺的热爱之情。他写完后，朋友就问他：“颜先生，您这诗写得这么快，难道是早就背熟了吗？”颜真卿笑着说：“我从小就喜欢书法，所以写起来就比较顺手，一挥而就。”朋友听了，不禁对颜真卿的书法功底佩服不已。
Legend has it that Yan Zhenqing, a great calligrapher in the Tang Dynasty, once visited a friend. In his friend's living room, there was an old zither. Yan Zhenqing saw the zither and thought of his own experiences learning to play the zither in his childhood. So he picked up a pen and wrote a poem on paper expressing his love for music. When he was done, his friend asked him: “Mr. Yan, you wrote this poem so fast, did you already memorize it?” Yan Zhenqing smiled and said: “I have loved calligraphy since I was a child, so I write easily and quickly.” The friend was impressed by Yan Zhenqing's skills in calligraphy.
Usage
这个成语多用于形容写字、绘画、写作等速度快，完成得迅速。
This idiom is often used to describe the speed and efficiency of writing, painting or creating texts.
Examples
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他写起文章来，一挥而就，令人佩服。
ta xie qi wen zhang lai, yi hui er jiu, ling ren pei fu.
He writes articles effortlessly, which makes people admire him.
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画家挥笔一挥，一幅山水画便一挥而就。
hua jia hui bi yi hui, yi fu shan shui hua bian yi hui er jiu.
The painter swipes his brush and a landscape painting is finished in a flash.
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他用毛笔一挥，一幅书法作品就完成了。
ta yong mao bi yi hui, yi fu shu fa zuo pin jiu wan cheng le.
He swipes his brush and a calligraphy work is done.