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to draw (a line)
to demarcate; to mark; to divide; to map out
to plan
彼の作品は日本文学に一線を画した。
His work drew a clear line in Japanese literature.
他社との違いを画するのが難しい。
Drawing a clear distinction from other companies is difficult.
この絵画は従来の印象派と一線を画している大作だ。
This painting is a major work that sets itself apart from traditional Impressionism.