首頁英語詞典PRPR英英釋意

PR

['pi 'ɑr]
  • abbr. 公共關(guān)系(public relations);性能要求(Performance Requirement)

英英釋意


1. a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process