adj.艰苦的；费劲的
Her work is a laborious task. 她的工作很艰苦。
Cleaning the forest is a laborious business. 清理树林是份艰苦的差事。
Checking all the names was a slow, laborious job. 核对全部名字是件既慢又费劲的事。
adv.艰难地；辛勤地
