计算了一次蒸汽经减温减压后的火用损失。
The exergy loss of primary steam after temperature and pressure reduction is calculated.
停车费收入每年超过1百万美元，该区的街道得以享用两周一次蒸汽清洁服务。
With parking revenue in excess of $1 million a year, its streets receive biweekly steam-cleaning.
现代交通的第一次发展是蒸汽船。
The first development in modern transportation was the steamship.
我第一次看到喷发出来的烟灰是白色的，非常白，就像蒸汽一样。
When I first saw the eruption plume, it was a very white, steam-rich plume.
我一次又一次地擦火柴，擦不亮再摸索出一根新的，这样汽油的蒸汽顺着斜坡悄无声息地蔓延到汽油罐周围。
While I struck it on the box, again and again, and then fumbled for a better match, gasoline vapors were flowing invisibly back down the slope toward where I'd left the can.
本文还对热泵干燥、电加热干燥、蒸汽加热干燥的一次能源消耗和能源费用进行了比较和经济评价。
The primary energy consumption and the energy cost of the heat pump dryer are compared with those of electrical heating dryer and steam-heating dryer and their economic evaluations are carried out.
同样的，蒸汽机第一次把快速运输变成了可能。
Similarly, the steam engine brought for the first time the possibility of rapid transportation.
蒸汽发生器内部部件较为复杂，载荷作用下一次侧的力学行为通常会影响管板上部的部件，如支撑板和管束。
Internal components of steam generator are complex, and the reaction of primary side under loads will influence the components above the tube sheet, such as support plate and tube bundle.
蒸汽供暖一次性投入较小，但使用维护费用较大；
The initial costs of a steam heating system are relatively low, but the maintenance costs are high.
采用激光散射法原理设计的测量装置测量蒸汽湿度和水滴直径，并且给出了一次水滴和二次水滴的具体测量方法。
A measuring facility has been designed by using the principle of laser scattering method, and the concrete measuring method for primary and secondary water droplet being given.
这是一次试验，确定是否可以建造一艘可成功地进行商业运行的蒸汽船。
It was an experiment to see if anyone could build a ship and operate it successfully as a business.
分析了钢铁企业余热蒸汽回收利用系统的特点，研究表明，做好余热蒸汽的回收和科学利用可以使钢铁企业对一次能源的需求量减少约8％。
The waste-heat stream system is researched and it is shown that about 8% of the primary energy would be saved with the reasonable waste-heat stream recoveries and utilizations.
分析了钢铁企业余热蒸汽回收利用系统的特点，研究表明，做好余热蒸汽的回收和科学利用可以使钢铁企业对一次能源的需求量减少约8％。
The waste-heat stream system is researched and it is shown that about 8% of the primary energy would be saved with the reasonable waste-heat stream recoveries and utilizations.
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