(of physical work 体力劳动 very hard and making you tired 艰苦繁重的；累死人的 She realized with dismay that the task would take weeks of back-breaking work. 她沮丧地意识到，这项任务将花费数周的艰辛工作。
Oxford Collocations DictionaryBack-breaking is used with these nouns:- labour
- toil
- work
- …
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