• Adjective

    requiring much work, exertion, or perseverance
    a laborious undertaking.
    characterized by or requiring extreme care and much attention to detail
    laborious research.
    characterized by or exhibiting excessive effort, dullness, and lack of spontaneity; labored
    a strained, laborious plot.
    given to or diligent in work
    a careful, laborious craftsman.

    Synonyms

    adverb
    arduously , difficultly , heavily
    Lấy từ « http://tratu.soha.vn/dict/en_en/Laboriously »

    tác giả


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