=NationalAcademician， National Academy 全國科學(xué)院會員；全國科學(xué)院
=North America 北美
=National Archives 國家檔案館
adv.(副詞)
不
conj.(連詞)
主要用于蘇格蘭，也不
n.(名詞)
【化】鈉，元素鈉的符號
Namibia，納米比亞
英語翻譯
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)
造句
【近義詞】
sodium
鈉
常用短語
nab
n\\\'t
NAA
Nau
NAW
NAL
Naz
NAE
NAV
NAC
nar
NAI