Yet clare s love was doubtless ethereal to a fault , imaginative to impracticability . with these natures , corporeal presence is sometimes less appealing than corporeal absence ; the latter creating an ideal presence that conveniently drops the defects of the real 由于这些天性，有时候他爱的人在他的面前倒不如不在他的面前更令他感动不在他的面前，他可以创造出一个理想的人来，从而把真实的缺点消除了。
2.
Early association with country solitudes had bred in him an unconquerable , and almost unreasonable , aversion to modern life , and shut him out from such success as he might have aspired to by following a mundane calling in the impracticability of the spiritual one 他的幼年生活同乡村幽静生活的联系，使他对现代城市生活生出一种不可抑制的几乎是非理性的厌恶来，因此也使他同另一种成功隔离开来，使他既不愿从事精神方面的工作，也不愿立志追求一种世俗的职业。
3.
In the field of automatic control , the states feedback always is one of the most effective methods , however , the states are not available in the most practical systems , therefore the contradiction arises between the exclusiveness of the states feedback and it ' s impracticability 在自动控制领域中，状态反馈往往是最为有效的控制策略之一，但是一个系统的状态往往是不可直接测量的，状态反馈在性能上的不可代替性和物理上的不可实现性构成了一对尖锐的矛盾。
4.
These workers found that there was uncertainty regarding appropriate action to combat biofilm formation and lime scale . many hospitals also found the examination of rinse water for endotoxin as recommended in htm 2030 to be impractical , due to the cost , impracticability of tests and difficulties in quantitative methods 这些工作者发现，在如何对抗生物膜和氧化钙上，各机构采取的措施不一定靠得住。许多医院也发现，出于成本原因、测试的不可操作性和量化方法的困难性， htm 2030所推荐的漂洗用水内毒素检验无法操作。
