单词	天然碱岩
释义	天然碱岩trona rock
随便看	nationalität nationalization nationalizations nationalize nationalized nationalized industry nationalizer nationalizers nationalizes nationalizing national joint computers committee national joint computers committee，njcc national key laboratory building plans national key new product plan national key project of new technology national knights of the ku klux klan national labor relation board national labor relations act national labor relations board national labor relations board 国家劳资关系委员会 national lakeshore national land information service national land information service {=nlis} national land information system national land information system {=nlis}