The study has indicated that using WSHP system for air condition in power plants can not only reduce first cost of investment, but also realize high efficient and energy-saving operation.
可见热电厂采用水源热泵空调系统可以降低初投资费用,实现系统高效节能运行,是最理想的空调方式。
参考来源 - 利用电厂余热的水源热泵空调系统的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
But upgrading to every new release of Windows may be one of the first costs to go.
但是每次升级到新的Windows系统也许是我们最先需要付出的代价。
The first costs you nothing but the time and effort required to set up your own Certificate Services server.
您执行任何操作，但时间和精力才能设置您自己的证书服务服务器的第一个成本。
First, let's look at a breakdown of the costs.
我们首先看一下成本的详细数字。
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