nd (neutral density)

• 中性密度

nd (neutral density)的英文翻译是什么意思，词典释义与在线翻译：

英英释义

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