PR

名词 pr:

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
   同义词：praseodymium, atomic number 59
2. a self-governing commonwealth associated with the United States occupying the island of Puerto Rico
   同义词：Puerto Rico, Porto Rico, Commonwealth of Puerto Rico
3. a promotion intended to create goodwill for a person or institution
   同义词：public relations