彼は昼夜を問わず研究に没頭している。
He is immersed in his research day and night.
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Handwriting
Example sentences
The workers worked day and night to finish the bridge construction.
彼は成功せんと、昼夜を問わず努力した。
He worked hard day and night, intending to succeed.
彼は高鳳漂麦の精神で、昼夜を問わず研究に没頭している。
With the spirit of 'Kōhō Hyōbaku', he is immersed in his research day and night.
Usage Notes
Refers to both day and night, often emphasizing a continuous effort or operation.
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