燃料电池让氢与空气通过催化合成反应产生电力，唯一的副产物仅是热量和水。
Fuel cells combine hydrogen and air to produce electricity by running them through a chemical catalyst. The only byproducts are heat and water.
这种转变的一个副产品是一些测量经济表现的指数的相对滑落，比如电力消耗，铁路货运量，新增银行信贷。
One by-product is a fall in the relevance of indicators such as power consumption, rail-cargo volume and new bank credit in gauging economic performance.
摘要：粉煤灰是火力发电厂电力生产过程中排放量最大的工业副产品。
Abstract: : Coal ash is a large amount of solid wastes produced from power plants and.
应用推荐