单词	existential quantifier
释义	existential quantifier noun : a quantifier (such as for some in "for some x, 2x + 5 = 8") that asserts that there exists at least one value of a variable called also existential operator Word History First Known Use 1936, in the meaning defined above
随便看	rub out rub rail rub salt in someone's wounds rub salt in the wound rub salt in/into someone's wounds rub salt in/into the wound rub salt into someone's wounds rub salt into the wound rub shoulders rub shoulders with rub someone up the wrong way rub someone's nose in rub the wrong way rub up rub up the wrong way rub-a-dub rub-off rubaboos rubaces rubais rubaiyat Rubaiyat stanza rubaiyats ruban Rubarth's disease

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