They had the laborious task of cutting down the huge tree.
他们要完成砍伐大树的艰苦工作。
formidable[fəˈmɪdəbl]
He took on the formidable task of reforming the whole system.
他承担起改革整个系统的艰巨任务。
无聊的 boring
dull [dʌl]
The conference was deadly dull.
会议开得死气沉沉的。
tiresome ['taɪəsəm]
I find it very tiresome doing the same job day after day.
日复一日做相同的工作让我觉得非常无聊。
tedious['tiːdiəs]
He that can read and meditate will not find his evenings long or life tedious.
会读书和思考的人不会感到长夜无聊或者生活乏味。
忧虑的 worried