To write a composition or text perfectly in one go, without any need for revisions or corrections.
他思如泉涌，下笔如有神，一篇长文竟然文无点易，令在场的编辑们赞叹不已。
His thoughts flowed like a spring, and he wrote as if divinely inspired; a long article was completed without a single revision, leaving the editors present full of admiration.
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