That may be difficult to realize, however, because an unknown number of doses is already tied up through contracts between pharmaceutical companies and countries that can afford them.
不过，因为不知多少疫苗已经被买得起的国家和制药厂签订采购合同预订了，这些计划实现起来也许有些困难。
For infrared surveillance system, it is most difficult that the measurements are only angles not distance, which makes target location of fire control system be difficult to realize.
对于红外预警系统，目标定位的最大难点是观测量只有角度，没有距离，这就使得火控系统的目标导引遇到困难。
What some teenagers don't realize is how difficult life can be after they get addicted to drugs.
一些青少年没有意识到一旦他们染上毒瘾，生活会变得多么困难。
When I realized that I had to exercise in order to get back in shape I didn’t realize how difficult it would actually be to exercise every day.
当我意识到我需要锻炼来恢复我的体型时，我才意识到每天锻炼是多么困难的一件事。
Looking back, we might realize that we learned the most from what seemed to be the most difficult of circumstances.
回首过去，我们可能会发现，我们从似乎是最困难的条件下学到了最有用的东西。
Inside the kingdom, you realize you’ve made your journey more difficult than it had to be simply because everything you’d been so reluctant to leave behind is useless in your new life.
在神的国里，你认识到，自己把这趟旅程搞得很累，而本来是不必这么累的，就是因为你舍弃每一样东西时都很勉强，而这些东西在你新的生命中毫无用处。
What we often don't realize when signing up for all these accounts, though, is how difficult it can be to permanently delete our accounts when we've had enough.
然而，我们在注册所有这些账号时，却很少意识到日后要永久删除它们何其困难。
If such a governing body is not in place, it can be difficult for an enterprise to stem the proliferation of silo services and realize the benefits of SOA.
如果没有此类治理机构，企业就很难阻止竖井服务的增多，也很难实现SOA的好处。
The struggle to realize your life plans might be difficult, and you will receive little assistance from persons close to you.
实现你人生目标的道路并不平坦，在努力拼搏之余你会得到来自身边的人的帮助。
The dream is very often difficult to realize, may because just like this only then becomes more meaningful, the life will have many goals, but will achieve these goals for only will be own dream.
梦想往往很难实现，可正因为这样才变得更有意义，人生会有很多目标，而完成这些目标为的只是自己的梦想。
For those of us who can read this interview, it is hard to realize how crippling illiteracy must be and how difficult it is to survive without the knowledge we gain from the written word.
对于有能力阅读这篇访谈的我们而言，一定很难了解文盲的负面影响有多大，也很难体会在缺乏从书写文字中获得知识的情况下谋生有多困难。
If there is no shareholders 'inspection right, it is difficult to realize the shareholders 'other rights, and the fraud of company managers will be exacerbated.
如果没有股东查阅权，股东的其他权利也难以实现，公司管理者的欺诈和隐瞒现象也会加剧。
Whatever faith the Spurs have in themselves, they have to realize that climbing out of this hole against the Lakers will be much more difficult than bouncing back against New Orleans.
无论马刺队对自己有什么样的信念，他们必须认识到，要摆脱对阵湖人队的困境，远远难于击败新奥尔良黄蜂队。
Because it is difficult to realize the BP network model by computer programming language, while the MATLAB software enables this question to be solved for its strong function.
由于BP网络模型的实现需要借助于计算机编程语言的实现难度比较大，而MATLAB软件强大的功能使得这一问题得到解决。
Things must be at the optimum point of finality, I realize, but linear thinking makes non-time difficult to grasp.
我知道事情一定会有一个最好的结局，但是线性思维让我难以理解non - time(时间消失)。
If the above question cannot be solved in time, it is difficult to realize the goal of including the majority in this system in 2008.
如果上述问题得不到及时解决，就难以实现2008年新型农村合作医疗制度基本覆盖全体居民这一目标。
Traditional SSB system was analogue, it was difficult to realize, and it always too big to be moved and test.
传统的单边带语音通信系统大都是模拟的，实现起来比较复杂，往往由于庞大而不便移动和调试。
Although present technologies can be applied to realize the interoperability of specific distributed retrieval systems, it is still difficult to establish universal interoperability specifications.
现有的技术对于实现具体的、个别的分布式检索系统的互操作虽然没有问题，但要建立普遍意义的互操作规范，尚有一定难度。
Although present technologies can be applied to realize the interoperability of specific distributed retrieval systems, it is still difficult to establish universal interoperability specifications.
现有的技术对于实现具体的、个别的分布式检索系统的互操作虽然没有问题，但要建立普遍意义的互操作规范，尚有一定难度。
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