steam engine是什么意思

steam engine是什么意思 steam engine steam是什么意思? who invented the first steam engine?翻译 who invented the first steam engine. Who invented the first steam engine? look after steam engine这句话该怎么翻译呢?steam engine不用加s?谢谢! 帮我翻译下 Walt invented the steam engine急! James Walt ----the steam engine.用invent 的正确时态 steam generator是什么意思 steam distillation是什么意思 start stop engine是什么意思 engine coolant是什么意思 engine-oil&gasoline是什么意思 fire-engine是什么意思 engine,management是什么意思 Altair Engine是什么意思 SI Engine是什么意思CI