steam engine是什么意思
steam engine是什么意思
steam engine
look after steam engine
13.James Watt ______ the steam engine.
16.The engine _____ smoke and steam.
Who invented the first steam engine?
who invented the first steam engine.
who invented the first steam engine?翻译
帮我翻译下 Walt invented the steam engine急!
James Walt ----the steam engine.用invent 的正确时态
免steam补丁中的steam是什么意思
steam distillation是什么意思