| 释义 |
NA nɑ:,nə 高●●●○○COCA¹⁷⁸²BNC⁵³²
基本英英近义反义
abbr.无名麻醉剂=Narcotics Anonymousabbr.全国科学院会员=National Academicianabbr.全国科学院=National Academyabbr.北美=North Americaabbr.不适用的=Not Applicable
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近义词 sodium钠 |