zhè wèi / fā míng jiā / huā le / shí nián / shí jiān / zhōng yú / yán zhì chū / yì zhǒng / jié néng / jìng shuǐ / shè bèi

这位发明家花了十年时间，终于研制出一种节能净水设备。

This inventor spent ten years developing an energy-saving water purification device and finally completed it.