Of course, payback is not an issue on a system that needs to be replaced anyway in a place where pipelines to gas are already in place.
在一个已经铺设好天然气管道,且燃油系统无论如何都要被替换掉的地区,补偿当然是不成问题的。
XProc is not the first W3C attempt to establish an XML processing pipelines standard.
Xproc并不是W3C对建立一个XML处理管道标准所做的第一次尝试。
Using pipelines in this way is not restricted to text streams, although that is often where they are used.
管道的这种使用方式并不局限于文本流,尽管这是它的最常见用法。
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