It is a hard nut for him to crack.

这对他而言是一个难。

He embarrassed me with a difficult question.

他出了一道难难住了。

She handles this difficult subject with a light touch.

她处理起这种难来得心应手。

Will the negotiators be able to untie the Gordian knot?

这些谈判者能够果断地解决这个难吗？

He is absorbed in the calculation of that difficult maths problem.

他全神贯注地在算那道数学难。

Who do you admire most? That's a toughie.

你的人是谁？这可是个难。

This thorny problem on the environmental protection floored the new mayor.

这个关于环境保护的棘手难新任市长难住了。

He put forward a baffling question.

他提出了一个难。

The dilemma presented quite a poser.

困境人很大的难。

I challenged him to make good his boast.

他出了个难，让他兑现自己夸下的海口。

I've just had a brainwave; I know a new approach to the difficult problem!

刚才灵机一动,突然想出了一个解决这一难的新办法!

Inflation is the Government’s main bugbear.

通货膨胀是政府的主要难。

He is meeting the tickler successfully.

他在顺利地处理着这难。

On the surface she can be very pleasant and helpful, but underneath she’s got problems.

表面上她亲切和气又乐于助人，可实际上她也有难。

You've posed an awkward question.

你已经提出了一个难。

It's a hellish problem.

这是一个令人讨厌的难。

"A missing piece of the puzzle has always focused on pin-pointing when Gigantopithecus existed," said Rink.

“一个长期令们费解的难，在于判定巨猿曾经存在的时间。”

The relapse of orthodontically rotated teeth can be a serious problem in occlusal stability after orth-odontic treatment.

扭转牙的复发是正畸临床治疗后牙稳定性的难之一。

That was a stumper. We brought experts from the media, coaches, scouts, a GM or two. Nothing.

这的确是个难，从媒体，教练，球探或者球队经理们那里得出的答案都各不相同。

And keeping the satellite's huge beam and the distant rectenna reliably synced up also stands as an unsolved technical issue.

而要使卫星发射出来的巨大微波束与地面的网格形天线一直保持同步，也是一个尚未解决的技术难。