It is crucial to choose the number of principal component in modeling system with pca approach 利用该方法建立系统的模型时，主成分数的选取是一个关键问题。
In electronic commerce , one of the main works is safety problem that is a key aspect 在该项目中，本人的主要工作是解决电子商务中的一个关键问题，即安全问题。
The extended domain arise a key problem that is how to implement the grid security 网格技术应用范围的扩大，直接引发的一个关键问题就是如何实现网格系统的安全性。
Flutter has a critical bearing on the design of suspension bridges that in the rising tide in china 目前，我国正处于悬索桥修建的高潮，而颤振是控制其设计的一个关键问题。
Among the work efficiency problems of the platform , human ' s catch to ocular information is a key problem 在ucav地面操作平台的工效学问题中，人对视觉信息的捕捉是一个关键问题。
Alarm event correlation , which can reduce redundant alarm events , is a key problem to network management 摘要对告警事件进行关联处理，去除冗余告警，是网络管理需要解决的一个关键问题。
One key issue : mergers and acquisitions - - the main drivers of big wealth - - could die down with tighter credit 一个关键问题是：作为创造巨富的主要推动力的并购交易可能会因信贷紧缩而减少。
High precision positioning is based on carrier phase measurements . how to confirm integer ambiguity is very important 以载波相位观测量为依据进行高精度定位时,整周模糊度的确定是一个关键问题。
The shortage of education investment is the critical problem , which interferes with the development of chinese higher education 教育经费投入不足，一直是困扰我国高等教育事业发展的一个关键问题。
Contextualization of objects / collections vs . uncritical adoption of social tendencies and fashions remains a key issue 是否人们能摒弃社会趋势和时尚来研究文物藏品的来龙去脉，仍旧是一个关键问题。
