=NationalAcademician， National Academy 全国科学院会员；全国科学院
=North America 北美
=National Archives 国家档案馆
adv.
副词
不
conj.
连词
主要用于苏格兰，也不
n.
名词
【化】钠，元素钠的符号
Namibia，纳米比亚
英英释义
Noun:
a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
美
