laborious /ləˈborijəs/ adjective Learner's definition of LABORIOUS
[more laborious; most laborious]
: requiring a lot of time and effort耗时费力的;费劲的 -
Removing mildew stains is a laborious [=difficult, painstaking] task.除去霉迹是一件很费劲的事。
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a slow and laborious process/procedure缓慢而艰难的过程/程序
— laboriousness
noun [noncount]