null
音标与读法
这里为大家介绍下null 是什么意思,希望能帮助到各位朋友。
音标:[ nʌl ]中英文翻译
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。
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,
lacking any legal or binding force; "null and void"
同义词:void,
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。
单词网DAnCI.583316.cOm