So far, machines have a pretty hard time emulating creativity, arbitrary enough not to be predicted by a computer, and yet more than simple randomness.

到目前为止，机器在模仿创造力方面有相当困难的时间，它们的随机性足以让计算机无法预测，但也不仅仅是简单的随机性。

youdao

Although it is a simple view, this aspect is hard to argue with.

尽管这是一个简单的观点，但却难以争辩。

youdao

In all the currents flowing in our simple model, it's hard to point out what that service really is.

从我们简单模型中的所有当前流程中，很难指出那个服务到底是什么。

youdao

The president's message to students was simple: study hard,pay attention in class and embrace the opportunity to learn.

VOA: standard.2009.09.08

But finally, Reiner says, well, thank you for visiting us, it's all very wonderful, but you know our audience would really like to know; it seems like a simple question but it's awfully hard to understand, but how can a great, big, enormous, heavy thing like this airplane get off the ground?

但最后 雷纳说到,谢谢你的来访,太棒了,但你知道吗,我们的观众非常想知道,这问题貌似简单,但却很难让人明白,问题是,像这么一个巨大且沉重的飞机,是如何飞起来的呢

耶鲁公开课 - 古希腊历史简介课程节选

The way to think about the Cheap Revolution is simple, yet hard to do.

FORBES: Cheap Revolution, Part Six

The reason for the painfully slow economic growth in the U.S. is simple to understand and hard to fix: weak demand.

FORBES: How Bernanke's Fed Can Boost Demand

The strategy is simple to describe, hard to achieve.

ECONOMIST: Not least his own party