The task should be matched to your ability level—not so difficult that you'll feel stressed, but not so easy that you'll get bored.

任务应该与你的能力水平相匹配——不要困难到使你感到压力，但也不要容易到使你感到无聊。

youdao

It's not difficult, it's just not easy.

这不难，也不容易。

youdao

Yet making that first difficult step to admit to the problem does not make recuperation easy.

然而，艰难地迈出第一步，承认自己的进食障碍，并不会使康复变得容易。

youdao

"He knows that this suspension of settlement construction is difficult, that it is not easy for anyone;

VOA: standard.2010.01.03

Well,it's difficult; it's not easy.

当然这是有点难的，不容易。

耶鲁公开课 - 聆听音乐课程节选

America's political structure was designed to make legislation at the federal level difficult, not easy.

ECONOMIST: Politics in America

It can be difficult to imagine not having affordable, relatively easy access to the internet or a public education system that teaches computer skills.

FORBES: Entrepreneurship, South African Style

This is not easy - these are difficult, difficult judgments.

BBC: Welfare Reform Bill: Part two