na_单词na_na的解释和用法

na基本解释

abbr.无名麻醉剂(=Narcotics Anonymous)

abbr.全国科学院会员（=National Academician）

abbr.全国科学院(=National Academy)

abbr.北美（=North America）

abbr.不适用的（=Not Applicable）

na同义词

na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)