导致这些问题出现的原因很多，头绪纷繁复杂。
There are many reasons leading to these problems and they are always hydra-headed and complex.
当这些问题出现时，病人有时会被描述为患上了下肢动脉缺血。
When these problems develop the patients are sometimes described as having critical limb ischaemia.
文章认为全球问题可归结为人口、资源、环境三大方面，并分析了这些问题出现的原因。
This paper thinks the global problems are referring to the following three factors like: population, natural resources and environments, and also analyzes the causes of their creation.
导致这些问题出现的原因是各地城市化水平低、第三产业内部结构升级缓慢、存在制度约束；
The causes are three regions' low urbanization level, the slow internal structure upgrade in tertiary industry, the existence of system restriction;
随着Web 2.0技术的推广，越来越多的 Web应用程序被重新设计，在更改的过程中，这些问题出现的频率甚至会更高。
With Web 2.0 technologies taking off, more and more Web applications are being redesigned, and as they get changed, these same questions come up even more frequently.
该方法通过预计哪些环节最可能出现问题，或一旦出了问题对人危害较大，来建立防止这些问题出现的有效措施以保证食品的安全。
This method is most likely by problems which link, or once a problem of great people, to establish prevents these problems and effective measures to ensure food security.
这些问题出现之时，空客的订单已堆积到160份：起初，空客欲达到收支平衡所需的订单数为250份，而每一次的延期都使这一数值增加。
All this comes as orders for the new airliner have stuck at around 160: each delay pushes up the number needed for break-even from the original figure of 250.
不管怎样，这些带子是完全安全的，一些蜂鸟已经戴上这些带子很多年了，没有出现任何问题。
Anyway, these bands are perfectly safe, and some humming birds have worn them for years with no evidence of any problems.
这些问题是他们在处理堆积如山的残骸工作期间或之后出现的。
These problems developed during or after their time working in the mountain of wreckage.
环境法假设国家是在特定的环境中出现的，这些环境存在严重的人口问题或农业用地短缺。
The environmental approach hypothesizes that states appear in certain environmental settings, settings which have a severe population problem or a shortage of agricultural land.
高管对某一行动方针的过度承诺，尤其是在过去行之有效的情况下，很可能会忽略问题初起的迹象，或在问题出现时误解这些迹象。
Heavy commitment by an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.
这些同时出现的挑战似乎没有那么势不可挡。对于一个存在了几个世纪的问题——如何让电力变得便携——它们给出了越来越好的答案。
Those simultaneous challenges appear less overwhelming with increasingly better answers to a centuries-old question: how to make power portable.
肥胖、心脏病和糖尿病开始出现在以前从未出现过这些问题的人群中。
Obesity, heart disease and diabetes are beginning to appear in a people for whom these have never been problems before.
随着这种新的习惯科学出现，这些策略被用于销售问题美容霜或不健康食品时引发了争议。
As this new science of habit has emerged, controversies have erupted when the tactics have been used to sell questionable beauty creams or unhealthy foods.
苹果公司在这些问题上的立场是在斯诺登事件出现后形成的，在那之后，公司开始采用了一系列的技术，这些技术在默认情况下将使用者的数据加密，限制他人访问。
Apple's stance on these issues emerged post-Snowden, when the company started putting in place a series of technologies that, by default, make use of encryption to limit access to people's data.
最后，优秀的读者掌握了几种特殊的技巧，当出现阅读问题时，他可以运用这些技巧。
Finally, the good reader has at his command several special skills which he can apply to reading problems as they occur.
许多消防队员在接触这些植物后出现了皮肤问题，至少有三名消防队员因为皮肤问题不得不去医院治疗。
Many firefighters have got skin problems after touching the plants, and at least three have had to go to the hospital for treatment for their skin problems.
记忆力减退、做熟悉的任务出现困难、抽象思考出现问题，这些都是疾病开始的征兆。
Memory loss, difficulty in performing familiar tasks, and problems with abstract thinking are all indicators of the beginning of the disease.
试着提醒他们，因为这些差异，与父母的关系才会出现问题。
Try to remind them of any problem in their relationships with their parents because of these differences.
如果出现了这些问题，一定要第一时间去咨询医生。
Consult your doctor immediately if any of those problems arise.
出现这些问题时，您可以撤消更新，也可以通过还原环境的稳定状态来恢复更改之前的状态。
When these problems occur, you can either undo the updates, or recover from the changes by restoring a stable state of the environment.
据一位北约内部人士观察，这些问题的出现不总是因为这些盟友“不够可靠，而是因为他们没有合适作战的装备”。
One NATO insider observes that such problems arise not always because those allies “are chicken, but because they don't have the right equipment for war-fighting conditions”.
随着这些问题不断的出现，我更加意识到家庭委员会可以为建立企业基础弥补很多不足。
As the questions went on, the more I realized that family commitment can make up for a lot of infrastructure.
只有那些拥有丰富经验的用户才会注意到网关中代表输入和输出分支的较大的图形，这些图形暗示会有问题出现。
Only experienced users would notice the larger shapes for the input and output branches in the gateways that hint at the problem.
历史表明，作为未能提供足够的经济刺激的结果，今日所说的这些问题确实可能会出现。
History shows today's problems could certainly materialise as a consequence of the failure to provide sufficient economic stimulus.
虽然所要解决的这些问题又出现种种新的复杂层面，但采用的方法是行之有效的，并已证实其自身的价值。
Though the problems being addressed have new dimensions of complexity, the approaches are well-established and have proven their worth.
但关于这些新工具的问题出现了。
RosettaNet已经承诺当他们推出重新建模的具有很好连接的模式时，这些问题将不会再出现。
RosettaNet has promised these problems will go away when they roll out a re-modeled, well-connected schema.
只是在去年的时候，这些问题才出现恶化，与此同时，ebay也有大量的临时卖家流失到Craigslist(我们可以看到去年一年里面，Craigslist的流浪增长了40%。)
These problems were only compounded during the last year, as eBay also lost a lot of its casual sellers to Craigslist (which saw its traffic rise 40% over the past year).
但是，即便这些机制都到位，还是会出现问题。
But even with these mechanisms in place, problems can still arise.
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