好的口碑营销需要企业的主动把握，要求企业合理规划设计，这其中一定会产生费用的。
Good word-of-mouth marketing businesses needs to grasp the initiative, the reasonable requirements of enterprise planning and design, which will certainly give rise to costs.
复合材料结构设计是复合材料在结构上合理应用和降低全寿命周期费用的关键。
The composite material structural designing is the key to application to structure with science and reason and reduction in the whole life-span period's expense.
设计一个封闭循环的脱墨设施在技术上是可行的，但设施的费用较高，目前在经济上尚不尽合理。
Design a closed cycle deinking facility is technically feasible, the cost of the facility, however is high and not currently justifiable economically.
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