n.d

英 美
  • n.未注明出版日期
  • natural adj.自然的;天然的;私生的
  • tower n.塔;高楼vi.高耸;胜过
名词 nd:
  1. a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium

  2. a state of north central United States bordering on Canada