Trying to apply new methods to projects that have established deadlines is difficult, and often impossible.
在确定了最终期限的项目中运用新的方法是相当困难的，通常是不可能的。
Too often, rules are so vague and complex as to make replication impossible.
规则是如此模糊和复杂，通常不太可能得到复制验证。
He did not set any particular mark on the house, but examined and observed it so carefully, by passing often by it, that it was impossible for him to mistake it.
他没有设置任何特殊的记号在房子上，而是非常仔细的检查和观察他，凭借房子旁边的信息，他不可能再弄错了。
This is limiting as it requires the alteration of a document about which the claim is being made — often undesirable, and if the document format isn't RDF, impossible.
这是有限制的，因为它需要对文档的有关声明是怎么产生的进行改动，这常常是不合需要的，而且如果文档格式不是RDF，则不可能发生改动。
Perfectionists often get caught in the endless cycle of regret and blame that makes it difficult, if not impossible, to move on from their mistakes.
完美主义者常常会由于不能或者很难纠正自己的错误而陷于无休止的悔恨和自责中。
It adds a significant cost to operating a business, and this cost is often impossible to quantify at the outset.
它明显地增加了开店的成本，但这些成本又无法在开始时确定。
Scratch a teacher or an administrator (or a parent), and you often hear that it is impossible to get the best teachers without paying big salaries;
随便抓一个老师或者校长（或者一个家长），你都会听到他们说没有好的待遇怎么可能得到最好的老师呢。
This means that if you often tell yourself that it is difficult or impossible to acquire money, the subconscious mind will accept your words and put obstacles in your way.
这就是说，如果你经常对自己说：很难、不可能赚到钱，你的潜意识就会接受到这种想法，并在你的前进的道路上设置障碍。
This shift occurred was when I was finally able to let go of my eating disorder. We often hold ourselves to impossible standards and end up feeling bad.
这种转变是在我最终摆脱饮食失调后才发生的。我们常常给自己套上了难以企及的高标准，最终又以糟糕的情绪结束。
Market gurus and other students of misaligned stock, bond or home prices often say that although it is easy to spot an asset-price bubble, it is impossible to know the event that finally pricks it.
市场权威和股票、债券或住房研究者们通常认为，识别价格泡沫并非难事，但却很难料知最终刺破泡沫的具体事件。
This is important for many industrial USES, where it's undesirable or downright impossible to make the code public, often because of previous agreements and licenses.
这对于许多工业应用来说很重要，因为由于以前的协议或许可，这种场合下一般不希望公开代码或者公开代码是显然不现实的。
They came from the opposite corner of the country and spoke none of the local languages; what Arabic they spoke was often almost impossible to understand.
他们来自这个国家的另外一个角落，而且不会说当地方言；他们所说的阿拉伯语几乎都没法听懂。
And the parents who end up working with social services are often facing circumstances that make being organized nearly impossible.
最终与社会服务合作的父母经常面临一些境遇无法做到有条理。
Besides, finding witnesses willing to speak and assembling sufficient evidence are often virtually impossible in such chaos.
而且，在被派驻国混乱的局势里，几乎不可能找到愿意出庭的证人或是搜集到充分证据定罪。
It is often impossible to determine if human-to-human transmission has occurred since the family members are exposed to the same animal and environmental sources as well as to one another.
这往往很难确定是否发生了人际传播，因为家庭成员都暴露于同样的动物和环境来源并且彼此接触。
We often hold ourselves to impossible standards and end up feeling bad.
我们常常给自己套上了难以企及的高标准，最终又以糟糕的情绪结束。
It often seems impossible for contestants for power to win and consolidate legitimacy, because it's easy to build resistance to legitimacy and the rewards are high.
这样看来，让那些为了权利争夺的竞争者在获胜的同时巩固合法性几乎是不可能的了，因为对于竞争者而言，建立对合法性的反抗是很容易的，而且回报可能非常的高。
At the same time, we ask humans to perform what are often impossible monitoring or backup tasks and then blame them when the inevitable accidents occur.
同时，我们还让人类去做那些通常是不可能的监控和备份的工作，然后在不可避免的事故发生的时候把责任归咎于他们。
However, this is often very difficult and, in many cases, almost impossible.
但很多情况下，这通常是非常困难的，几乎不可能。
The most feted producers are often prevented from expanding by law and geography, and it is impossible to replicate the weather that produced the 1982 Lafite.
那些有名的酒庄通常都受到法律和地理的限制而难以扩张，而且想要复制出1982年酿制拉菲时的天气是不可能的。
However, because of stress and time constraints at work and at home, this often is impossible.
但是由于工作的压力和时间的限制这通常是很难办到的。
Families agree to work off the debt but their bosses add on high interest and living expenses, making it impossible to repay the debt, as their salaries are often less than $5 a day.
一些家庭同意清偿债务，但其老板施加高利贷和很高的生活费用，使得偿还债务变为不可能，因为他们的工资经常每天不到5美元。
Cemeteries are often destroyed by building projects, and many rural Chinese have migrated to cities, making it impossible to return home for Qingming.
墓地常常因建筑项目而摧毁，并且许多乡下人已经进城，不可能因清明节回乡扫墓。
Few things are impossible in themselves; and it is often for want of will, rather than of means, that man fails to succeed. - La Rochefoucauld, French writer.
几乎没有什么事情是根本做不成的；人们之所以失败，与其说是条件不够，不如说是缺乏意志。—拉·罗什·富科，法国作家。
Don't worry about that. It's impossible. All the ski runs are carefully marked. And if there is something that might be dangerous, like a cliff or something, then they often put a fence around it.
不要担心那个。那是不可能的。所有的滑雪道都有清楚地标示出来。而且如果有什么危险的。像是悬崖或什么的。他们通常会在附近围上栅栏的。
Nothing is impossible - "no way" or "impossible" is often mediocre and the lazy excuse.
没有什么不可能——“没有办法”或“不可能”常常是庸人和懒人的托辞。
On the physically demanding and entertainment intensive court-scape of the NBA, it's often impossible to distinguish between swagger and stagger.
在NBA里对身体的需求以及球场上的娱乐性，似乎在狂妄自大和蹒跚而行之间很难辨别清楚。
On the physically demanding and entertainment intensive court-scape of the NBA, it's often impossible to distinguish between swagger and stagger.
在NBA里对身体的需求以及球场上的娱乐性，似乎在狂妄自大和蹒跚而行之间很难辨别清楚。
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