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单词
open ball
释义
open ball
[`ō·pǝn `bȯl]
MATHEMATICS
In a metric space, an open set about a point
x
which consists of all points within a fixed distance from
x
.
随便看
typhoon wind
typhus fever
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typography point
Typotheria
typp
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tyrosinase
tyrosine
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tyrosinosis
tyrothricin
Tyson's gland
Tytonidae
tyuyamunite
tyvelose
TΩ
U
u
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