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The team faced a laborious task of sorting through thousands of documents.
The archaeologists engaged in the laborious task of carefully excavating the ancient ruins, documenting each discovery along the way.
The process of manually transcribing the handwritten documents was laborious and time-consuming.
She found the laborious task of hand-copying the old manuscripts both tedious and exhausting.
The laborious process of writing the research paper took several months to complete.
