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单词
ionosphere
释义
ionosphere
i
on
o
sphere
/
aɪˈɑnəˌsfɪr
/
noun
Etymology
ETYMOLOGY
ionosphere
Origin:
1900-2000
ion
+
-sphere
(as in
atmosphere
)
earth science
the ionosphere
the part of the
atmosphere
that is used to help send radio waves around the Earth
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更新时间:2024/9/20 5:56:33