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单词
null set
释义
null set
ˌnull ˈset
noun
[countable]
math
a mathematical set with no members, usually written { }
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Afghan
afghan
Afghanistan
aficionado
afield
afire
aflame
AFL-CIO
afloat
AFN
afoot
aforementioned
aforethought
afoul
afraid
afresh
Africa
African
African-American
African American
African-American Studies
African Union, the
Afrikaans
Afrikaner
Afro
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更新时间:2026/9/10 23:55:58