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null是什么意思
发布时间:2021-03-05 作者: 英语查
null 是什么意思 |
音标:[ nʌl ] |
中文翻译与英英解释 | adj. 1.无效力的,无束缚力的。 2.无效的,无用的,无益的;无价值的。 3.没特征[个性]的,没表情的。 4.〔罕用语〕不存在的,没有的;零(位)的;空的。 n. 【数学】零,零位;空;【无线电】零讯号,微弱讯号。 a null indicator 零示器;零位指示器。 the null method 衡消法。 null and void 【律】无效;失效(This check is null and void. 本支票无效)。 vt. 使无效。
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| a quantity of no importance; "it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn''t hear zilch about it" 同义词:nothing, nil, nix, nada, aught, cipher, cypher, goose egg, naught, zero, zilch, zip, zippo,
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| lacking any legal or binding force; "null and void" 同义词:void,
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NULL本意是“空的;元素只有零的”意思牛津词典编译出版委员会/著;曹书乐/译;《新牛津英汉双解大词典》[M].上海外语教育出版社. |
例句与用法 | 1. | The null subset corresponds to the term 1 . 空集则对应于常数项1。
| | 2. | The operator o is the null operator . 算符O是零算符。
| | 3. | A promise obtained by force is legally null . 一个以武力获得的契约在法律上是无效的。
| | 4. | This check is null and void . 本支票无效。
| | 5. | He was null . 他是一个毫不引人注意的人。
| | 6. | The null result was directly related to a central postulate of the theory . 零结果都直接与理论的中心假设相联系。
| | 7. | The device provides extreme sensitivity through a small range around the null point . 此装置在零点附近很小一段范围内具有极高的灵敏度。
| | 8. | The zero or null matrix denoted by 0 is definde as a matrix all of whose elements are zero . 如果一个矩阵的所有元素都为零,则称它为零矩阵。
| | 9. | A null output should occur when the core is at the center point between the two secondary coils . 当磁心位于两个次级线圈之间的中点时,没有输出。
| | 10. | As a result, the denominator and numerator should be about equal if the null hypothesis is true . 因此,如果无效假设为真,那么分母和分子应该差不多相等。
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