It may be difficult of impossible to liquidate an existing position to assess the value to determine a fair price or to assess the exposure to risk.
也许难以或基本不也许结算现有仓位，评估价值，决定合理价格或评估风险。
An operation of this magnitude is going to be difficult.
一个这么大的手术会很难的。
It's difficult to reconcile the demands of my job and the desire to be a good father.
协调我工作的要求与我当个好父亲的愿望很难。
Determining the functions of play is difficult because the functions may be long-term, with beneficial effects not showing up until the animal's adulthood.
定义玩耍的功能是困难的，因为这些功能可能是长期性的，其积极影响要到动物成年后才会显现。
We knew it was difficult to recover a body because any corpse left in the wild will be eaten, but we thought we could learn the name of the man.
我们知道找回一具尸体是困难的事情，因为遗弃在荒野的任何尸体都将被吃掉的，但是我们认为我们可以查到这个男人的姓名的。
I think the rest of it will be difficult to write.
我认为剩下的部分会很难写。
Astronomers have long speculated that the missing baryonic mass might eventually be discovered in intergalactic space or as some large population of galaxies that are difficult to detect.
天文学家长期以来都在推测，最终可能会在星际空间或者是在难以探测的大量星系中发现丢失的重子质量。
Extracting heat from very hot, dry rocks presents a more difficult problem: the rocks must be fractured to permit the circulation of water, and the water must be provided artificially.
从极热的而干燥的岩石中提取热量，暴露出了一个更加困难的问题：必须击碎岩石以保证水的循环，而水必须是人工提供的。
Now, even though it may be difficult to understand how a huge mass of ice can move—or flow, it's another word for it—it's really no secret that glaciers flow because of gravity.
如今，即使想要知道一大块冰如何移动——或换个词讲，漂浮——是非常困难的，但众所周知冰川漂浮是由于重力。
It can be difficult to get a group of people to cohere.
要使一群人做到彼此一条心有时候很困难。
He had got himself into a hole and it was going to be difficult to get out of it.
他使自己陷入了困境，难以摆脱。
It can be difficult to get spares for some older makes of car.
有些旧型号汽车可能不好买配件。
Today's collection provides some amazing examples of stormy photography which can be very difficult to capture.
今日的合集提供了一些叹为观止的暴风雨摄影范例，这是非常难捕捉到。
People became aware of how difficult life could be when you can't hear anything.
人们开始意识到，当你什么都听不到的时候，生活会变得多么困难。
Although some sightings of UFOs are difficult to explain, most can be explained quite easily.
虽然有些目击 UFO的现象很难解释，但大多数都可以很容易地解释。
As a ballerina, to embody the duality of the Swan Queen and the black swan can be a fiendishly difficult task.
作为一名芭蕾舞女演员，体现天鹅女王和黑天鹅的二元性可能是一项极其困难的任务。
Returning to normal life can be difficult, but some small routines—mail delivery being one of them—may help residents remember that their communities are still their communities.
回归正常生活是很困难的，但是一些日常小工作——邮件递送就是其中之一——可以帮助居民想起他们的社区仍然是他们的社区。
It was difficult for individual samurai overlords to increase their income because the amount of rice that farmers could be made to pay in taxes was not unlimited.
对于单个的武士统治者来说，要增加他们的收入是很困难的，因为农民可以用来纳税的大米数量并不是无限的。
But the requirements of either of the Acts may be difficult to meet.
但是很难满足任何一个法案所提出的要求。
Boys, of course, attract more abuse, such as beating, because, once again, parental expectations are high, and boys tend to be more energetic and difficult to control than girls.
当然，男孩会受到更多的虐待，比如殴打，因为父母的期望又很高，而且男孩往往比女孩更有活力，更难控制。
Leading a group of people can be difficult.
领导一群人可能很难。
It would be difficult for developed countries to maintain the size of population.
发达国家很难保持人口规模。
Of all the subjects, chemistry seems to be the most difficult for me.
对我来说，化学似乎是所有学科中最难的。
According to Jessica Hagy, author of How to Be Interesting, it's not difficult to make yourself interesting at a dinner party.
根据《如何变得有趣》一书的作者杰西卡·哈吉的说法，在宴会上让自己变得有趣并不难。
Don't be afraid to dislike something—discovering what you find difficult is a key part of learning more about yourself.
不要害怕不喜欢某件事——发现你觉得困难的事情是更多地了解自己的关键。
Looking back, we might realize that we learned the most from what seemed to be the most difficult of circumstances.
回首过去，我们可能会发现，我们从似乎是最困难的条件下学到了最有用的东西。
Many developers find constraint violations to be a difficult type of class loading problem to resolve.
许多开发人员发现约束违反是一种很难解决的类装入问题。
Sometimes it can be difficult to deal with all of these new emotions.
有时，处理所有这些新的情绪是困难的。
Traders argue that manipulating the market would be difficult because of its size.
交易员争辩说，这个市场规模巨大，因而想要对其进行操纵是相当困难的。
Introductions and conclusions can be the most difficult parts of papers to write.
介绍和结论是论文最困难的部分。
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