Many project teams find it hard to divide a project into meaningful iterations before they know what the project is really about.
很多项目团队发现在他们知道项目是真正关于什么的之前划分一个项目成为有意义的迭代是困难的。
Although meteorologists know what conditions favour their formation, they are hard-pressed to say exactly where a storm will occur until it is almost too late.
尽管气象学者们清楚地知道有利于雷暴形成的条件，但是要及时而又精确地预测雷暴发生的地点使他们感到压力重重。
After that I still did not know what to make of fiscal policy other than it is complicated, messy, hard to time properly, and no one really knows how effective it can be.
即便如此，我依然对如何制定财政政策一无所知，唯一肯定的是，财政政策是复杂，凌乱，难以掌握时机和有效性。
Others say the problem isn't that it is hard to eat fish, but that people don't know what fish to eat and how.
还有些人则表示，问题不在于鱼吃起来费事，而是大家不知道该吃什么鱼，怎么吃鱼。
It is hard for firms to know what the "right" prices are in two-sided markets. Cut charges on one side and it will raise them on the other, chasing customers away and making the business shrink.
企业很难掌握什么是两方市场“适当”的价格，对一方收取的费用很可能会转嫁到另一方，迫使消费者退出市场而导致业务缩水。
Although meteorologists know what conditions favour their formation, they are hard-pressed to say exactly where a storm will occur until it is almost late.
尽管气象学家知道什么样的条件促进它们的形成，但往往到了基本上晚了的时候他们才艰难的说出雷暴到底什么时候发生。
It is hard for firms to know what the "right" prices are in two-sided markets.
对公司来说知道双边市场中“正确”的价格是很难的。
When it comes to assessing your child's behaviour, it's hard to know what is normal.
当你去评价孩子的行为的时候，确实很难去分清什么是正常的行为，什么又不是。
It is a little hard to know what romantic means to those who use the word umbrageously.
那些对浪漫这个词有怀疑的人要理解什么是浪漫有点困难。
For the past fifteen years, it has been a characteristic of F1 that it is very hard to follow cars and overtake and it is hard to know what to do to improve the situation.
在过去的15年里，跟车与超车困难已经成为了F1的一个特征，也很难了解怎么做可以改进这一状况。
It is hard to overestimate the value of good names. Remember Ward's principle: you know you are working on clean code when each routine turns out to be pretty much what you expected.
好名字的价值如何估计都不为过，记住Ward原则：当每一个子程序都只做它应该做的，你就拥有了简洁代码。
Think this cloud looks just like a cat? Well guess what? It is a cat! Hard to believe I know, but trust me, it's true.
你认为这片云看起来就像一只猫？可是你猜怎么着？它就是一只猫。我知道这难以置信，但是相信我，这是真的。
The problem with that plan it is hard to know what to pay for the bonds.
这个计划的问题是，了解为这个债券付出什么是困难的。
He called me, I feel embarrassed I do not know what to do hard it is connected or not connected?
他打电话过来时，我觉得很尴尬不知如何是好，是接还是不接？
This is, of course, easy advice to give - but it is hard to take when you are right in the middle of a situation about which something surely must be done, even if you don't know what.
当然知易行难，尤其是你已经处在某一状况中，知道有些事必须要做，但又不知做什么的时候。
As for the outside world, it is hard to know collectively what it can do in the face of the launch.
对外界来说，全面了解此次发射的应对之策很难。
Sometimes it's hard to know exactly what it is you're supposed to be learning.
有时候真的很难说你应该去学些什么。
It is really hard to describe it, but once you install it you will know what I meant lol.
这是真的很难形容的，但一旦你安装它，你就会知道我的意思大声笑。
I know what it is like to work hard on a story only to receive a rejection slip from the publisher. I also know the pressure of trying to live up to a reputation created by previous victories.
我亲身体验到努力写好的一篇小说仅仅换来一张来自出版社的退稿条，我也懂得来自以前取得荣誉的压力。
As we're thinking about our inner life this month, contentment is a great virtue to consider. But sometimes it's hard to know what contentment is because there are several ways to define it.
这个月份，当我们思想内在生命时，知足是我们要思想的一个重要美德，但有时要明白何谓知足就会比较困难，因为可以有不同的方法来为它下定义。
There are now so many brands and types of beer being imported into China that it is hard to know what is available and which to drink.
中国的进口啤酒品牌和种类五花八门以至于消费者很难辨认和选择口感。
It's really not hard to do, especially if you chose a niche market that you are interested in. People really do want to know what you have to say, even if it is only opinions or your daily life story.
这真的不是很难做到，尤其是如果您选择的市场，你感兴趣的人们真的想知道你不得不说，即使是只有意见或您的日常生活故事。
Since the cause is not completely understood it is hard to know what the risks are.
因为产生疾病的原因还不是很清晰，所以很难说它的危险性在什么地方。
I tried very hard to make up a story for it. I really don't know what is going on. This is a tough one.
你做得很好了，从不知到知的确是很难的事，因「象」太多，冯兄已捕捉了一个象，但此象却不是发生在父母方面。
From both a business and technology perspective, "big data" is generating a lot of discussion-so much so, that it can be hard to know what is hype and what is reality.
无论从商业还是技术视角来看，“大数据”都引发了很多争议。很难分辨何为真实，何为炒作。
It is hard to face talking about this because you don't know what to say.
很难面对并讨论这一切，因为你不知道该说什么。
It is hard to face talking about this because you don't know what to say.
很难面对并讨论这一切，因为你不知道该说什么。
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