prs
名词 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
同义词:praseodymium, Pr, atomic number 59
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, PR
a promotion intended to create goodwill for a person or institution
同义词:public relations, PR