英语词汇“null set”的读音、翻译、释义、用法及例句-初旭网

词汇	null set
释义	null set ‘数’空集合, 零集合 ( 亦称empty set)
随便看	double room doubles double salt double scull double-seater double sentry double series double sharp double shift double-sided double-space doublespeak double standard double star double summer time doublet double tackle double take double-talk double taxation double-team Double ten doublethink double thread double time

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