It is time for colleges and universities to rethink their business models, cut cost, and restructure the tuitions to affordable levels.
现在该是高等专科学校和大学重新考虑它们的商业模式、降低成本，并把学费调整到不甚昂贵的水平的时候了。
Moreover, the business models to justify the time and cost of adding wireless services are embryonic.
此外，这些商业模型证明了增加无线服务所用时间和成本的合理性，但它们仍处于萌芽阶段。
The increasing use of new tools such as computerised virtual design helps cut the cost and length of time needed to bring new models to market, but it is still an expensive process.
像电脑虚拟设计这样的新工具使用的增加大幅缩小了新车型开发的费用和周期。不过这些新工具依然价格不菲。
In the models of dynamic traffic assignment, it is assumed that travelers cannot reduce their travel cost by unilaterally changing the departure time and route choices.
在动态交通分配模型中，假定在交通均衡状态下司机不可以通过改变出发时间和行驶路径而降低出行费用。
Equipments random inventory management strategy and relevant factors include ordering cost, storage cost, average cost per unit time, probability of no shortage of spare parts, and decision models.
器材随机库存管理控制策略及其有关因素包括：订货费用、存贮费用、单位时间内备件的平均费用、不缺备件概率及决策模型。
On the basis of different type of postponement strategy, the product cost models with the factor of time cost and without are proposed.
然后建立了不同延迟策略下，在考虑资金时间价值因素和不考虑资金时间价值因素时的产品成本模型。
The shortage of the current optimization models and solution methods were analyzed, and the main factors affecting the quality, building time and cost of prototypes were discussed.
分析了目前分层方向优化模型和求解方法中的不足，讨论了影响原型制作质量、制作时间和制作成本的主要因素。
Newer cars and more expensive cars will cost more to insure and maintain over time, while older makes and models represent far less expense.
较新的汽车和更昂贵的汽车将花费更多，以确保并维持一段时间，而老品牌和型号代表远远少于支出。
Currently, most of the academic location models regard the Minimum logistics cost as the goal, with little regarding of time efficiency.
目前，学术界提出的大部分选址模型都是以物流成本最小为目标，很少考虑时间效率问题。
Being aware of when detail is needed and when it's not is crucial to forecasting budgets and cost models. Unnecessary detail means wasted time.
我们需要能够清楚的知道什么时候需要细节，而什么时候它们又对制定预算和成本模型无足轻重。
Then the basic mathematic models of the problems are constructed from contractor's and client's viewpoints respectively and extended to the cases of time-based payment and cost-based payment.
随后分别从承包商和客户两个角度构建了该问题的基本数学模型并将其扩展为基于时间和基于费用的支付模型；
In light of different payment rules, the models are extended to progress-based, time-based and cost-based ones further.
鉴于支付方式的不同，将基本优化模型扩展为基于进展、基于时间和基于费用的MPPSP优化模型；
In light of different payment rules, the models are extended to progress-based, time-based and cost-based ones further.
鉴于支付方式的不同，将基本优化模型扩展为基于进展、基于时间和基于费用的MPPSP优化模型；
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