n.d.

英 美
  • abbr.未注明出版日期(nodate)
  • nd n.[化]元素钕的符号abbr.北达科他(美国州名)(=NorthDakota)abbr.无日期(=nodate)
  • Nd-Fe-B 钕铁硼
  • Nd-glass 钕玻璃
  • nd-handling 手工生产,手工操作
  • nd-lease 平等租借交换
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