If you describe a task or job as laborious, you mean that it takes a lot of time and effort.
例句
Keeping the garden tidy all year round can be a laborious task.一年到头把花园拾掇得干净整洁也不是件轻松活儿。
英汉词典释义
adj.
勤劳的;困难的, 费力的
They had the laborious task of cutting down the huge tree.他们接受了伐大树的艰苦工作。
英英词典释义
Adjective
1. characterized by toilsome effort to the point of exhaustion; especially physical effort;
"worked their arduous way up the mining valley""a grueling campaign""hard labor""heavy work""heavy going""spent many laborious hours on the project""set a punishing pace"