读音

abbr. prior permission only 仅限于事前许可
ppo 用法和例句
- He convinced me that ppo was going to the next great thing .
- 他告诉我ppo将是下一个伟大的发明。
- Fox , like most inventors , was already on the next project , becoming champion for a new thermoplastic called ppo ( polyphenylene oxide ) .
- 福克斯,就像大多数的发明者一样,已经开始了下一个新项目的新耐热塑料ppo(聚亚苯基氧化物)的研发。