arduous

/ˈɑrʤuəs/

characterized by effort to the point of exhaustion; especially physical effort

中文释义：艰巨的；费力的；艰苦的

Climbing Mount Everest is an arduous journey that requires months of training.

攀登珠穆朗玛峰是一项艰巨的旅程，需要数月的训练。

The arduous task of cleaning up the oil spill took several weeks.

清理漏油的艰巨任务耗时数周。