“专利”用英语怎么说？

“专利”的拼音为：zhuān lì...

专利使用费让这位发明家得以再次立足于商界。The royalties enabled the inventor to re-establish himself in business.试试这一种新的专利药品吧.Try some of this new patent medicine.这项专利期限为三年.The patent runs out in three years'time....