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。
Not only will those skills be actually integrated into the curriculum but they will be very important to have in the future because they are difficult to automate.
因为这些技能很难自动化，它们不仅会被整合到课程中，在未来也将变得非常重要。
If you are talking about a subject you know well, as I've just advised, prepared, preparing the speech itself should not be too difficult.
如果你正在谈论一个你很熟悉的话题，就像我刚才建议的，做好准备；准备演讲本身应该不是太难。
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。
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。
Whereas plastic composite materials can also provide great strength and lightness, they can be difficult if not impossible to recycle.
虽然塑料复合材料也能提供高强度，轻巧的部件，但塑料复合材料几乎很难回收利用。
All of these operations are wholly owned, a position that under current regulations would be difficult if not impossible to replicate in Malaysia, Thailand, Indonesia and China.
所有这些业务都是独资拥有的，这种地位在当前监管下如果并非不可能也起码很难在马来西亚、泰国、印尼和中国复制。
If the markets behavior were truly random, then it would be difficult if not impossible to create consistency.
如果市场的行为真的是随机的，那么产生持续一致性真的很难。
Indeed, important military shifts have already been set in motion that will be difficult if not impossible to reverse.
确实，军事上的重要改变已经在发生，要逆转这样的趋势，如果不是不可能的话，起码也是很困难的。
"If the effect really does exist, it would appear to me that it would not be difficult to use it in a clinical setting," he says.
他还说：“若是该效应真正存在，那么对于我而言，这将不难将其应用在临床环境之中。”
Phrase and proximity searches are not currently performed, but they would not be difficult to implement.
短语和近似搜索现在并未实行，但实施并不困难。
But to continue to grow intellectually as long as you remain alive with the momentum that your weeks of hard work have provided will not be at all difficult.
但是，只要你几周以来的辛勤努力所带来的动力让你仍然保持活力，你就能持续进行智力成长，这点并不难。
If a problem can be solved by money alone, it is not really a difficult problem.
如果仅仅用金钱就可解决一个问题，那么这不是一个真正困难的问题。
At work, this tends not to be so difficult; at home it will be another story!
工作时，这点看起来不是很困难；在家是它就完全是另回事了！
It would not be difficult to improve on the graphics, like drawing the bars in 3d or using different colors.
对图形进行改进也不是很困难，您可以用3d效果绘制条形。或是使用不同的颜色。
Such fruitful results would be difficult, if not impossible, to achieve without the speed enabled by agile development processes.
如果没有敏捷开发流程提供的速度，这样丰硕的成果将很难或不可能实现。
While this approach is not without merit, it can be difficult to accurately reproduce the asynchronous processing of user interface code.
虽然这种方法不是没有好处，但是要精确的复写出与用户界面异步交互的代码却很难。
Although no tool is directly compatible with the samples, this is good middle ground. Adapting them to your tool of choice will not be difficult.
虽然没有直接支持这些例子的工具，但作为很好的起点，针对选用的工具进行适当调整并不困难。
Retired Israeli General Shlomo Gazit of Tel Aviv University says getting an agreement with the Syrians might not be that difficult, but getting the Israeli public to accept it will not be easy.
特拉维夫大学的以色列退役将军加齐特说，以色列和叙利亚达成协议也许并不难，但是要让以色列公众接受这项协议就不那么简单了。
For casual users, it can be difficult to justify the cost, not to mention that you have to maintain a server as well.
对于普通用户来说，确实很难权衡这两种方式那种更划算。 更不用说你还要购买并维护一个服务器。
Even if the correlation were not spurious, it would be difficult to know which way causation ran.
即使这个联系不是错误的，也很难知道这种因果关系是以哪种方式运行的。
In the crowded central regions of the galaxy, home to large Numbers of massive stars, supernovas are so common that the evolution of complex life-forms might be difficult if not impossible.
在银河系拥挤的中心区域存在着大量的大质量恒星，频繁的超新星爆发使得复杂生命形式的产生不是不可能就是极度困难。
As the innocent users of the currencies are paying for the bailouts, it is difficult not to be a liquidationist.
因为为紧急救助付账的是无辜的货币使用者，很难成为一个取消主义者。
If it's possible to tamper with the authentication device, such data capture should not be all that difficult.
如果有可能篡改认证设备，则获取这样的数据并不会很困难。
Because these concerns are not easily separated, the solution can be difficult to develop and maintain.
因为这些方面不容易剥离出来，所以这种解决方案很难开发和维护。
All of these Asian operations are wholly owned, a position that under current regulations would be difficult if not impossible to replicate in Malaysia, Thailand, Indonesia and China.
所有这些亚洲运营公司都是独资企业，在当前的管制下想要复制其在马来西亚，泰国，印度尼西亚和中国的辉煌，虽然不是不可能，但会相当困难。
Economists say even if the yen appreciates, though, it will not be difficult for Thailand to deal with it because its external debt is not high.
不过，经济学家说，由于泰国的外债总额并不高，即使日元升值，也不会给泰国造成太大的困难。
Economists say even if the yen appreciates, though, it will not be difficult for Thailand to deal with it because its external debt is not high.
不过，经济学家说，由于泰国的外债总额并不高，即使日元升值，也不会给泰国造成太大的困难。
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