| 单词 | null |
| 释义 | Word Frequency null(nʌl) adjective 1. without legal force; invalid; (esp in the phrase null and void) 2. without value or consequence; useless 3. lacking distinction; characterless a null expression 4. nonexistent; amounting to nothing 5. mathematics a. quantitatively zero b. relating to zero c. (of a set) having no members d. (of a sequence) having zero as a limit 6. physics involving measurement in which an instrument has a zero reading, as with a Wheatstone bridge Word origin C16: from Latin nullus none, from ne not + ullus any |
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