late 14c., "hard-working, industrious," from Old French laborios "arduous, wearisome; hard-working" (12c., Modern French laborieux), from Latin laboriosus "toilsome, wearisome, troublesome," from labor (see labor (n.)). Meaning "costing much labor, burdensome" is from early 15c.; meaning "resulting from hard work" is mid-15c. Related: Laboriousness.
权威例句
1. They had the laborious task of cutting down the huge tree.
他们接受了伐大树的艰苦工作.
2. 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。
3. The distance seemed interminable, and the walk was most laborious.
距离好象无穷无尽似的, 走起来真够吃力.
4. You may have the impression that this process is usually laborious.
你可能认为这种方法是艰难的.
5. We should not despise plain features, nor a laborious yet honest occupation.