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to phrases
null set
['nʌl'set]
math.
空集
;
空集合
(empty set)
;
零
测度
集
oil
空集
;
零集
tech.
零测度集
;
空集
(合)
null-set
['nʌlsεt]
gen.
零集
;
空集
null set
:
1 phrase
in 1 subject
Technology
1
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