arduous /ˈɑɚʤəwəs/ adjective Learner's definition of ARDUOUS
[more arduous; most arduous]
: very difficult艰辛的；困难的 -
He went through a long and arduous training program.他接受了漫长而艰辛的培训。
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arduous efforts艰辛的努力
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years of arduous study多年的勤奋学习
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an arduous chore/duty/job/task艰难的事务/职责/工作/任务
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an arduous journey across miles of desert穿越数英里沙漠的艰辛之旅
— arduousness
noun [noncount]