This is going to be hard and difficult work.

这将是艰苦卓绝的工作。

youdao

Life sometimes seems too hard and difficult to understand but no matter what obstacles are standing in your way right now you have the power to overcome them.

有时生活既艰难，又难懂，但无论你面对着怎样的障碍，都要记住你有跨越它们的能力。

youdao

As for Milan: 'We have been a bit unlucky in the league and Champions league. It's a hard and difficult period.

至于米兰：“在联赛和冠军联赛上我们有点运气不好，现在是一个艰难的时期。”

youdao

It was hard and difficult land.

VOA: special.2010.05.08

Why has it been so hard and why does it continue to be difficult to identify these pluripotent cells within tissues?

为什么会那么难呢,为什么在组织中识别多能干细胞,始终困难重重呢

耶鲁公开课 - 生物医学工程探索课程节选

This proves to be really difficult in the real world because in the real world it's hard to pull apart genes and environments So, you and me will have different personalities ? Why?

这在现实中是很难区分的,因为现实中很难,把基因和环境分开来讲,你和我有不同的性格,为什么？

耶鲁公开课 - 心理学导论课程节选

I've learned a hard and difficult lesson considering the childhood environment that I was brought up in - not to discriminate against any plant or creature.

BBC: Norfolk - Chris Skinner's wildlife haven

Make no mistake, there's more hard work ahead and more difficult choices to make.

WHITEHOUSE: President Obama��s Press Conference on the G20 Summit

Crucially the new virus seems hard to catch and is difficult to spread.

BBC: Threat from novel coronavirus 'remains low'