It's not difficult to get money for research or at least it's not always difficult.

获得研究的资金不难，至少说，不总是很难。

《柯林斯英汉双解大词典》

Keeping is harder than winning.; To start a business is difficult, but to keep it going is more difficult.

创业难守业更难。

《新英汉大辞典》

People correctly use "to" is not difficult, difficult is to correctly use "DE".

人正确地用“才”并不难，难的是正确地用“德”。

youdao

The report says Pittsburgh was forced to make many of the difficult decisions that other cities are facing now.

VOA: special.2009.07.13

It shouldn't be difficult to see a kind of problem that is beginning to arise in Milton's text here.

这是一个很容易看出的问题,在弥尔顿的作品中也被提了出来。

耶鲁公开课 - 弥尔顿课程节选

and she's now playing some pretty fairly difficult things considering that she has only taken for a couple of years. So,

尽管她才学了几年，她现在已经可以弹奏比较难的曲目了。所以，

和钢琴老师 - SpeakingMax英语口语达人

It will be a difficult time for Fletcher and a difficult time for England.

BBC: SPORT | Cricket | England | Boycott fears for beaten England

But scientific information can be difficult to understand and even more difficult to explain to others.

UNESCO: Science Communication

In these difficult times - the American people aren't afraid to face difficult choices.

NPR: Text of the Democratic Response to the State of the Union Address