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。
Whether this will be successful or not is still difficult to predict.
成败利钝尚难逆料。
The problem will not be difficult to solve, if properly handled.
如处理得当，问题不难解决。
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。
This will be difficult but not hopeless.
这虽有难度，但非全无希望。
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。
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。
KING: Was it difficult to not be what you had become known as?
金：成为一个和以前那个为人所知的你不同的人是不是很难呢？
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。
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。
It's not impossible to be different, but it is difficult.
当不一样的那个不是说不可能，而是很难。
Introducing a new currency would be difficult but not impossible.
引入一种新的货币将很困难，但并非不可能。
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。
Conserving threatened shark species might not be difficult.
保护濒危的鲨鱼物种或许并不困难。
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。
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。
It will be difficult - but not impossible - to dislodge.
把苹果打下来很难，但不是不可能。
It will be difficult - but not impossible - to dislodge.
把苹果打下来很难，但不是不可能。
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