英语词汇“无效”的读音、翻译、释义、用法及例句-初旭网

词汇	无效
释义	无效 1. to (or of) no avail; of (or to) no effect; null and void; in vain 2. invalid; nullified; useless; fruitless; futile; ineffective; ineffectual 3. nullity; invalidation; invalidity
随便看	Deweyan Dewey (decimal) classification Dewey, John dewfall dewily De Witt dewlap DEW line dew point dew-point spread dew pond Dewsbury dew-worm dewy dewy-eyed dexamphetamine dexiocardia dexter dexterity dexterous dextr- dextrad dextral dextran dextranase

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