I had set myself a tough assignment.

我给自己定了一项艰巨任务。

《牛津词典》

Springer thinks this "macho" vision of how tough a man should be needs to be changed.

这种体现一个男人多么坚强的方式应该改变。

youdao

But the long list of IMF recommendations for Spain shows just how tough a climb it might be for the euro area, as it tries to renew growth and regain its competitive footing.

尽管西班牙试图恢复增长并且重新取得竞争优势，但是国际货币基金组织大量的推荐措施表明了欧元区国家要取得增长是多么的困难。

youdao

Beets much larger than that can be tough and have to be cooked for a long time.

VOA: special.2010.03.02

So we finally got tough and we got Paul Volker in there and central banks around the world all managed to get tough around that time and we killed inflation but it created a recession.

所以，我们最终强硬地实施,并且将保罗？沃尔克作为主席,世界各地的中央银行,全都在那段时期内严格的实施,最终我们消除了通货膨胀，却制造了经济衰退。

耶鲁公开课 - 金融市场课程节选

It's a tough course.

这是一门很难学的课程。

建筑学专业教授 - SpeakingMax英语口语达人

There have been signs of differences in the Bush administration over how tough a stance to take.

ECONOMIST: Jaw-jaw beats nuclear war | The

It's almost as tough a way to make a buck as being a 19th-century craftsman with a hand-doweling jig.

FORBES: Magazine Article

Applying a tough sensibility to a tough assignment revitalized an amorphous status quo.

WSJ: Cooper Union's New Building, at 41 Cooper Square | By WSJ Architecture Critic Ada Louis Huxtable