Question

不胜感激！麻烦高人帮我翻译一下！！！

The cost of reducing AP emissions (per kg) as a result of gasoline substitution with hydrogen is presented in Fig. 5 as a function of the ratio in efficiencies Z of fuel cell (hydrogen powered) and internal combustion (gasoline powered) vehicles. It can be seen from this figure that when ‘‘renewable’’ hydrogen is used instead of gasoline, the cost of air pollution emissions abatement approaches the same for ‘‘renewable’’ electricity only if the efficiency of the fuel cell vehicle significantly (about two times) exceeds that of an internal combustion engine. On the contrary, the low positive and negative values for hydrogen from natural gas point out that its application in fuel cell vehicles allows a reduction in AP emissions almost without any financial expenditure connected to the fuel production technology. Nowadays, the average efficiencies (mechanical work/LHV of fuels) of an internal combustion and a fuel cell engine are about 0.25 (Cleveland, 2004) and 0.35 (efficiencies of a fuel cell stack and electrical energy conversion into mechanical work are about 0.4 and 0.9), respectively (Larminie and Dicks, 2003). The respective reduction of AP emissions as a result of gasoline substitution with hydrogen APg/APH as a function of Z is presented in Fig. 6. According to this graph, a ‘‘renewable’’ hydrogen introduction instead of gasoline leads to a reduction in air pollution more than ten times (from 38 to 76 for hydrogen derived from wind and from 16 to 32 derived from solar energy). It can be seen that gasoline substitution with hydrogen from natural gas allows a reduction of AP emissions of only 2.5–5 times. An analysis of the results presented in Figs. 5 and 6 suggests that ‘‘renewable’’ hydrogen represents a potential long-term solution to environmentally related transportation problems.

Answer 1

我不高!

Answer 2

太长了啊~~~~~~~

Answer 3

可以问问英语老师