invent 誰(shuí)～了蒸汽機(jī)？ Who invented the steam engine?/中國(guó)古代的四大～ four major inventions of Ancient China/～家inventor/～構(gòu)思inventive concept/～權(quán)patent rights of an inventor;ownership right to an invention;title to an invention/～證書(shū)certificate of invention/～專利patent for an invention