要养成吸烟习惯很容易，但要戒掉却极其困难。
It's very easy to fall into the habit of smoking, but extremely difficult to get rid of it.
与一些欧洲国家不同，一个身强力壮的移民要靠政府供养是极其困难的。
Unlike in some European countries, it is extremely hard for an able-bodied immigrant to live off the state.
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。
As a ballerina, to embody the duality of the Swan Queen and the black swan can be a fiendishly difficult task.
重建过去的气候变化是极其困难的，因为在欧洲和北美，几个世纪前才开始系统的天气观测。
Reconstructing the climate changes of the past is extremely difficult, because systematic weather observations began only a few centuries ago, in Europe and North America.
改变饮食方式可以是极其困难的。
但这些大型软件上线之后，要换掉它们可就极其困难了。
But once these massive software packages were in place, it was exceedingly difficult to change them.
人类用这种系统进行日常的数据组织和管理是极其困难的。
Such a system would be extremely difficult for day-to-day management and organization of data by human users.
如果您的设计依赖人类记住流程，实现遵从性就会极其困难。
If your design relies on humans to remember processes, compliance will be extremely difficult.
水牛再一次试图挺起身来，极其困难，过了一段时间终于设法站了起来。
The buffalo then tried to lift itself up, with great difficulty, and after some time managed to get on its feet.
当然，事实证明让计算机来处理自然语言是件极其困难的事情。
Of course, getting computers to deal with natural language has turned out to be incredibly difficult.
其中第一个步骤就是将水分解为氢和氧，这极其困难，因为水分子非常稳定。
The first of these involves splitting water into hydrogen and oxygen, a notoriously difficult thing to do because water molecules are so stable.
从根本上，他相信，创造出坚不可摧的彩票是极其困难的，如果不是不可能的话。
Fundamentally, he believes that creating impregnable tickets is extremely difficult, if not impossible.
纯棉连衣裙在夏季衣橱中不可或缺，不过要找到合心意的棉质连衣裙却极其困难。
No summer wardrobe should be without one, but the perfect cotton dress is notoriously hard to find.
不过，在HDBMS中极其困难的事(几乎非常少)在RDBMS中的难度只是中等。
However, the things that are extremely hard in HDBMS (all but a very limited few) are only moderately hard in an RDBMS.
然而，要通过一两个关键字来表达内容是极其困难的，特别是使用横向导航。
However, it's quite hard sometimes to communicate the content of a website's section with just one or two keywords, particularly if horizontal navigation is used.
他说，耶鲁以外的人要进入那个地方肯定是极其困难的，并非完全不可能，但极其困难。
'It certainly would be extremely difficult for someone from outside of Yale to get into that space. Not impossible, but extremely difficult,' he told the newspaper.
引发小地震是很容易的(参见上述有关石油开采的内容)，但是引发大地震是极其困难的。
Triggering a tiny earthquake is easy (see above about oil production), but triggering an earthquake big enough to matter would be extremely difficult.
当然，事实在于，优化网络以同时处理这些显著不同的数据分类即便可能，也是极其困难的。
The reality of course is that tuning the network to simultaneously handle these drastically different classes of data is extremely difficult, if not impossible.
当小鱼面临极其困难的问题时，比如说，突然遭到几个捕食者的袭击，他们会立刻形成鱼群。
When small fish face an extremely difficult problem-an attack, say, from several predators at once-they deal with it by forming a school.
通过限制每个组件的权限，使得攻击系统或通过攻击一个组件来获取更多都变得极其困难。
By restricting the permissions that each component has, both attacking the system as well as achieving much with a single compromised component is made significantly more difficult.
虽然物质产品的价值可以用金钱来衡量，但要估算别人为我们为所提供的服务的价值却是极其困难的。
Though it may be possible to measure the value of material good in terms of money, it is extremely difficult to estimate the true value of the services which people perform for us.
虽然物质产品的价值可以用金钱来衡量，但要估算别人为我们为所提供的服务的价值却是极其困难的。
Though it may be possible tomeasure the value of material goods in terms of money,it is extremely difficult to estimate the true value of the services whichpeople perform for us.
将数据从一个地方移到另一个地方，从一种格式转化成另一种格式，要保证数据不被改变是极其困难的。
It's actually extremely difficult to make sure that data isn't changed as it is moved from place to place, and from format to format.
在XSLT 1.0和XPath 1.0 中这不是不可能实现的，但都是极其困难的。
This was not impossible in XSLT 1.0 and XPath 1.0, but fiendishly difficult.
正如Benjamin所指出的，问题是对各式各样的MIME类型的全盘采用是极其困难的，而且不能扩展。
The problem as Benjamin points out, is that getting universal adoption of various MIME types is extremely difficult and doesn't scale.
要改变组织中的此类糟糕的敏捷性是极其困难的，因此要保护您自己，并保留有关您的时间都花在何处的书面文档。
It's extremely difficult to change this type of poor agility in an organization, so protect yourself and keep written documentation of where your time is being spent.
要改变组织中的此类糟糕的敏捷性是极其困难的，因此要保护您自己，并保留有关您的时间都花在何处的书面文档。
It's extremely difficult to change this type of poor agility in an organization, so protect yourself and keep written documentation of where your time is being spent.
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