最困难的

doubly difficult───难上加难

great difficulty───很大的困难

have difficulty───有困难

difficult───adj.困难的；不随和的；执拗的

in difficulty───处境困难

cause difficulties───造成困难

face difficulties───面对困难；面临困境

Eva specializes in one of the most difficult techniques of basketry.───伊娃专攻一种最难的编织篮筐的技艺。

I find it most difficult to express with an adequate force that flash, that shiver, that impact of passionate recognition.───我发现要恰如其份地表现一刹那的那种颤栗，那种动了感情发现的碰撞，真是最为困难。

difficult thing in a fast game of basketball is to change course midstream.───在一场快节奏的篮球比赛中，最难之事莫过于中途变线了。

the electromagnetic inverse scattering is one of most difficult problem due partly to its ill - posed , nonlinear and instability nature.───由于逆散射问题的求解存在病态性、非唯一性以及不稳定性，这给它的求解带来很大困难。

The name of the song is in fact one of the most difficult, but beautiful tricks one can do with a skateboard.───这首歌的名字，其实是最困难的，但美丽的技巧可以用的则是滑板之一。

"One of the biggest and most difficult stumbling blocks at this point is Russia, frankly, " says Harvard's Matthew Bunn.───“坦率地说，在这一点上，最大和最困难的障碍之一就是俄罗斯，”哈佛的马修-邦恩说。

It is often said that, next to the Presidency, the most difficult administrative position in the country is that of Mayor of New York.───人们常说，除总统职务以外，全国最难担任的行政职务就是纽约市市长。

The last two years of her life were the most difficult.───她最后两年的生活是最艰难的。

Learning a foreign language was one of the most difficult yet most rewarding experiences of my life.───学习外语是我一生中最困难也是最值得的经历。

The most difficult thing in life is to know yourself. 

This is his most difficult period.

This was the most difficult period of his life.

The most difficult thing is the decision to act. The rest is merely tenacity.

She has beautifully weathered through the most difficult time.

It is the most difficult time when people have to say goodbyeWish you the happiest journey and we look forward to your return in the near future.

He's the most difficult and exasperating man I know.

The three things most difficult are, to keep a secret, to forget an injury, and to make good use of labour. 

This last task is possibly the most difficult.