Thus , queries on these views are usually not feasible to gather statistical or historical data 因此，通常情况下，在这些视图上查询统计或者历史记录数据是不可行的。
E - learning courses offer user - controlled elements that just aren ' t feasible in regular training classes 电子学习课程为学生提供用户控制元素，这在常规的课堂教学中是不可行的。
It might not be practical to define your data structure statically , or the data might depend on information that is gathered at run time 静态定义数据结构有时是不可行的，或者数据可能会依赖运行时收集的信息。
This is used primarily in universities and airports where the end users are transient and managing encryption keys isn t feasible 这主要是用在大学和机场，在那里，最终用户是临时的，而且管理加密密钥是不可行的。
If the output - to - input ratio increases by using an activity of merger and acquisition , this activity will be probable 如果石油企业通过并购活动提高投入产出比，那么该并购项目就是可行的；否则，该项目就是不可行的。
Sms messaging across different cell networks such as international calls can also be expensive or even in some cases impossible 不同蜂窝网络之间的sms消息传递（比如国际长途）也会很贵，甚至于在某些情况下是不可行的。
Maybe it ' s the fact that you can ' t see his face crumple in misery as he reads your crude words , whatever the reason , it ' s incredibly common 也许事实上你看不到他读到你那粗鲁语言时的痛苦表情，无论什么原因，都是不可行的。
Being a kind of expensive magnetic materials , it is not advisable economically to improve the coercive force through the addition of smco 因smco价格昂贵，欲通过添加smco来获得高矫顽力的复合磁体从经济上来说是不可行的。
Several settlements are analyzed to eliminate ferro - resonance . since these settlements have disadvantages , the feedback reactive power compensator is infeasible 由于这些方法都存在严重不足，这种反馈式无功补偿方案是不可行的。
The encryption using crypto algorithms is ensured by the fact that it is computationally infeasible to generate plaintext that matches the hash value 使用加密算法的保密性由这样一个事实保证，即生成与哈希值匹配的明文在计算上是不可行的。
