laborious
adj.费力的；勤劳的；辛苦的
网络解释.艰苦的；费力的；勤劳的；费力
strenuous painful exacting complicated exhausting arduous difficult tiresome
双语例句
1. 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.
来自《简明英汉词典》