But I want to end by mentioning the hard problem as it is known now.

最后，我想再讲一个众所周知的难题。

youdao

"If I said to you I'd solved the hard problem, you wouldn't be able to guess whether it would be a formula, a model, a sensation, or a drug, " said Greenfield. "What would I be giving you?

“如果我告诉你已经解决了这个难题，你可能猜不到答案究竟是一个公式，一个模型，一种生理感觉或者是一种药物，”Greenfield 说，“我本该给你什么答案呢？”

youdao

It's not hard to get him talking—the problem is stopping him!

让他谈话并不难—难的是让他住口！

《牛津词典》

He said his government will work hard to end piracy, but he said the problem of poverty will first have to be tackled.

VOA: standard.2009.10.30

An obvious problem with this theory, and Freud acknowledges this problem in Beyond the Pleasure Principle, is that it's awfully hard to keep death and sex separate.

这个理论的有一个明显的问题，弗洛伊德在《超越快乐原则》中也承认了，那就是很难将死亡与性分开。

耶鲁公开课 - 文学理论导论课程节选

And the problem, in 1968 it was very hard to build a barricade across the Boulevard St. Michel, which was built by Hausmann at this time.

而在一九六八年,在圣米歇尔大道上,构筑街垒都是很困难的,那条大道就是豪斯曼建造的

耶鲁公开课 - 1871年后的法国课程节选

He said the findings would impact on drug policies, because they suggested reducing or eliminating the availability of cannabis would be "unlikely to make a dent" in the hard drug problem.

BBC: Cannabis 'not linked to harder drugs'

The extent of the problem is hard to know as South African police do not compile corrective rape statistics separately from other rape cases.

CNN: Horror of South Africa's 'corrective rape'

In fact, it was only when the revelation of the missing hard drives problem made his efforts unsustainable that this tactic had to be abandoned, leading to Gen.

CENTERFORSECURITYPOLICY: Center for Security Policy | Firing Richardson: A Necessary, If Not Necessarily Sufficient, Condition for Redressing the Clinton-Gore Insecurity Complex