第二个模型称为长轮询：本文将讨论这一轮询模型—因为它以最快的速度响应服务器上的事件—以及一些需要克服的困难。
The second model is called a long poll: this article discusses this polling model-because it allows the quickest response to events on the server-as well as some hurdles to overcome.
国家森林服务人员说，截至4月11日，易燃的植被，无法进入的地区和强大的风力是900名消防队员在控制火灾中所需要克服的困难。
As of April 11, the fire-prone vegetation, inaccessible terrain, and strong winds had thwarted 900 firefighters working to control the fires, said CONAFOR.
你曾经需要克服什么困难来获得如今的职业成就吗？
Did you have to overcome any difficulties to reach this point in your career?
现实中还是有很多的困难需要克服。
她们也需要获得支持，以预防及克服母乳喂养方面的困难，并处理好母乳喂养的时间问题。
They also need support to prevent and overcome breastfeeding difficulties and deal with competing demands on their time.
但是，在我们实现这种可能之前，即便是实施基本的RFID技术，零售商和也需要克服重重困难。
Before we can do that kind of thing though, retailers and suppliers need to overcome many hurdles to even implement the baseline RFID technology.
但是也需要你们去克服的困难。
我们要完成自已的光荣使命，还需要运用自己的耐心、智慧和创造性，克服很多困难，走过曲折。
To accomplish the glorious mission, it is necessary to exercise patience, make use of wisdom, be creative, surmount a lot of difficulties and go through some twists and turns.
如果科学家们知道该如何叙事的话，他们应该尝试向公众讲述这种类型的故事，我觉得科学家们需要克服的就是这样的困难。
And scientists can tell those kinds of stories if they know how and they try. And this is one of those challenges I think we as scientists need to beat.
这与敏捷开发是不一致的，而且有一些困难需要克服。
This is not inconsistent with agile development, but there are a few hurdles to overcome.
这是你需要克服的第一个困难，因为当你克服了后，你会发现这种痛苦也只有半英寸厚而已。
That's the first hurdle you have to overcome, because when you do, you will realize that the pain was only half an inch thick.
我们需要时间来克服我们的市场和我们的经济中存在的困难，而且新的挑战还会继续出现。
It will take time to work through the difficulties in our market and our economy, and new challenges will continue to arise.
在一个太阳能发电的环境中记录温度数据看起来再简单不过了，但还是有一些困难需要克服。
It seems simple enough to log temperature data in a solar generation context, but there are a couple hurdles to surmount.
为了达成这一效果，非洲需要采取正确的政策，克服诸多的困难。
For that to happen, Africa will have to choose the right policies and overcome its many problems.
一个有纪律的人，在内心具备了作出正确抉择的刚毅、勇气与耐力，能够克服困难，完成需要做的事情。
When a person has discipline they have the inner fortitude to make right choices, to do what needs to be done.
据我所知，对于很多网络内容供应商来说，需要克服的最大的困难就是——我们想通过自己创造的东西创造财富，但是售卖过程却不是我们擅长的。
And therein lies a big hurdle for a lot of the content producers I know - we want to create stuff and make some money from what we do, but the whole selling process is not our particular cup of tea.
这需要克服另外一个困难：即一种可以检测与修复这种设备的无创性方法。
That entails another hurdle: a non-invasive method of monitoring and repairing the devices.
实际上，获得推荐的最好方法是改变你的做法，改变你卖的东西，怎样克服困难，和当你不需要变得慷慨的时候仍然表现的大方。
In fact, the best way to get referrals is to change what you do, what you sell, how you act when times are difficult, how generous you are when you don't need to be.
不过太阳能技术也有自己需要克服的难点，由于太阳能极易转换为热能和电能，但是将这两种能源达到一定能量密度的储存，并将其应用于交通等应用领域却非常困难。
But solar presents its own challenges, since it's most easily converted into heat or electricity, and we can't store either of these at a high enough density for USES like transportation.
毕竟我一直都是早起的人，所以当闹钟响起的时候，我并不需要克服很大的困难来起床。
I think my previous early riser conditioning was a more significant factor in being able to get up as soon as the alarm went off.
在我们生活中的某些阶段几乎每个人都遇到过需要自己克服缺乏自信的这一困难。(我本可以做到！)问题在于你是如何做到的？
At some stage in our lives almost all of us will need to conquer our lack of confidence. (I've certainly been there!) the question is, how do you do it?
在我们生活中的某些阶段几乎每个人都遇到过需要自己克服缺乏自信的这一困难。（我本可以做到！）问题在于你是如何做到的？
At some stage in our lives almost all of us will need toconquer our lack of confidence. (I've certainly been there! ) The question is, how do you do it?
在这种治疗成为患者可以获得常规临床治疗前，仍然需要多年的时间进行试验，并且还有许多困难需要克服。
There would still be years of testing and many hurdles to overcome before the treatment would become routinely available to patients.
喜爱祷告-常常在白天感觉到祷告的需要然后就克服困难来祷告。
Love to pray - feel the need to pray often during the day and take the trouble to pray.
我想其实很多时候我们仅仅是需要一些额外的精力来克服困难。
我想其实很多时候我们仅仅是需要一些额外的精力来克服困难。
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