单词unachievable
adj.: 难以达到的；无法获得的
网络: 不可得
难以达到的；无法获得的:
that you cannot manage to reach or obtain
You may be dealing with a modern day Napoleon in the office if your manager demands the unachievable from her subordinates.
如果你的经理强求她的下属完成不可能任务，那你可能就是遭遇了现代办公室拿破仑。
While perfect security is unachievable here, there are techniques that can limit how much damage each application can do.
虽然完美的安全性是不可能达到的，但是有一些技术可以限制每个应用程序的危害程度。
By trying to rectify these two conditions, the architect is always trying to discover that unachievable state of perfection.
通过尝试修正这两种情况，建筑师总是努力探索不能达到的完美状态。
Leibniz"s life was dominated by an unachievable ambition to Excel in every sphere of intellectual and political activity.
莱布尼茨一生被这样一个不可能实现的野心所支配，那就是他企图在智力和政治的各个领域出人头地。
Therefore, it is nearly an unachievable task to create widely used and effective medicine, surgical operation or other treatment means.
因此，若要创造出一种广谱特效的药物和手术及各种治疗手段，在所有人类身上治病而获特效，是难以实现的。
When limited to a single enterprise, that same scale is unachievable, reducing the number of users who will find it valuable.
如果微博被限制到一个企业之内使用，那么相同的规模是无法被实现的，这将使得觉得其有价值的用户数量减少。
I hope that each of us can follow what Sima Qian advocated, "Though unachievable, aspiration to it remains. "
我希望我们每一个人都能够如司马迁说的“虽不能至，心向往之”。
They become freelancers, theater people, perennial graduate students - and many end up feeling their early goals in life are unachievable.
他们成为自由撰稿人，戏剧工作者，长期的研究生——许多人最终觉得，自己早年的生活目标是无法实现的。
This article was widely criticized by traditional instructors, as being far too optimistic and unachievable.
这篇文章被广泛批评为是传统的教师，太过乐观，无法实现。
Aim high, since with the unexpected breaking down barriers, once unachievable goals are now within your grasp.
制定远大的目标，因为随着意外消解的障碍，曾经被认为是不可实现的目标将在你的掌握之中。