这些汽轮机可大致分为两种基本类型, 即冲动式和反动式.These turbines can be broadly split into two basic types, the impulse and the reaction turbines.蒸汽经过输送管进入汽轮机,汽轮机再带动发电机.The steam is carried through pipes to steam turbines which drive the elect...
The novel sold 200 , 000 copies in hardcover and 2 million in paperback.那本小说的精装本卖了二十万册,平装本卖了两百万册.Yes. We have both the paperback and the hardcover.是的.我们有平装本和精装本.The hardcover is more expensive.精装本比较贵....