困难的的英文：
ardouous
difficile
difficult
hard
labourious
man-sized
painful
pinched
strait
untoward

参考例句：

A difficult weld
困难的熔接

The Budget gap
预算困难

Grasp the nettle
毅然面对[解决]困难

Be in trouble; be in the doghouse;in hot water
处于困难或危险中

insurmountable difficulty
不可克服的困难

To bear hard upon;press.
使痛苦不堪对某人施加困难；逼迫

The disabled form a special social group in straitened circumstances
残疾人是一个特殊而困难的社会群体。

to extricate oneself from difficulties
把自己从困难中解脱出来

A recurrent problem [difficulty]
反复地发生的问题[困难]

We had great difficulty in breathing, for the air was thin.
空气稀薄，我们呼吸非常困难。

ardouous是什么意思：
费力的,困难的
difficile是什么意思：
a. 困难的;难以相处的
difficult是什么意思：
adj. 困难的；执拗的；不易相处的

The exercise is that difficult!
练习题那么难！

You must admit the task to be difficult [ that the task is difficult ].
你应当承认这项任务是艰巨的。

You must admit the task to be difficult [that the task is difficult].
你必须承认这项任务是困难的。