It was a difficult task but we brought it off.

那是一项艰难的工作，但我们还是完成了。

《牛津词典》

She's set herself a difficult task.

她给自己安排了一项艰巨任务。

《牛津词典》

She's set a difficult task for herself.

她给自己安排了一项艰巨任务。

《牛津词典》

"What is required of us now is a new era of responsibility Ca recognition on the part of every American, that we have duties to ourselves, our nation and the world, duties that we do not grudgingly accept but rather seize gladly, firm in the knowledge that there is nothing so satisfying to the spirit, so defining of our character, than giving our all to a difficult task."

VOA: special.2009.01.24

Hobbes realizes this is a difficult and uphill task that he has set for himself.

霍布斯意识到他已经给自己,定下了一个困难而艰巨的任务。

耶鲁公开课 - 政治哲学导论课程节选

Speaking on a special British radio program, Scarlett said his officers face a difficult task.

VOA: standard.2009.08.10

Mr Romney has a difficult task - to look presidential without adopting the duties.

BBC: Hurricane Sandy - challenge for presidential rivals

Recruiting and retaining border patrol agents has been a difficult task for the federal agency.

NPR: Border Patrol Struggles to Find Enough New Agents

They will now face a difficult task in the quarter-finals against an unbeaten US side.

BBC: GB wheelchair basketball sides claim wins at Worlds