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单词
carbonium ion
释义
car·bo·ni·um ion
(kär-b
ō
n
ē
-
ə
m)
n.
An organic cation, such as H
5
C
+
, having a hypervalent carbon atom and a positive charge localized on the carbon atom.
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USMC
USN
USNA
usnea
usnic acid
USNR
USO
USP
Uspallata Pass
USPO
USPS
USPTO
usquebaugh
USS
Ussher
USSR
Ust-Kamenogorsk
Ust-Kamenogorsk
usu.
usual
usually
usualness
usufruct
usufructuary
Usumacinta
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更新时间:2026/6/10 13:00:42