| 释义 |
Noun: Pr- A soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
- praseodymium, atomic number 59
Noun: PR- A promotion intended to create goodwill for a person or institution
- public relations - Representation of all parties in proportion to their popular vote
- proportional representation - A self-governing commonwealth associated with the United States occupying the island of Puerto Rico
- Puerto Rico, Porto Rico, Commonwealth of Puerto Rico
Type of: commonwealth, metal, metallic element, packaging, promotion, promotional material, publicity, representation Part of: bastnaesite, bastnasite, Caribbean, Greater Antilles, monazite Encyclopedia: PR Pr |