| 词汇 | null |
| 释义 | null adjective uk/nʌl/ us/nʌl/ 无法律效力的 having no legal force The 1944 contract has since been declared null and void. 这份1944年的合同已被宣布无效。 About 200 marriages in the diocese were declared null last year. 该教区去年约有二百桩婚事被宣布无效。 Buyout terms become null if the company has not broken ground for a new stadium by July 1. 如果该公司到七月一日未能破土兴建一个新的体育场，则买断条款作废。 Synonym: invalid 没有价值的;没有作用的 with no value or effect Will these null findings change anyone's opinion of ESP? 这些无效的发现会改变任何人对ESP的看法吗？ Four decades of a null result should tell us something about the hypothesis that there are intelligent civilizations in space. 四十年来对于太空中存在智能文明这一假设的研究毫无结果，这应该给我们一点启示了。 mathematics specialized 空值，零 (of a set or matrix) containing nothing or containing only zeros A matrix having all its elements zero is said to be null and is written 0. 一个所有元素为零的矩阵称为空矩阵，记为 0。 Failed searches are defined as null set results. 失败的搜索被定义为空集结果。 null noun [ C ] uk/nʌl/ us/nʌl/ 空值，零 an empty value or a zero Flags may be used to prevent nulls by bringing attention to the absence of a value in a table. 可以使用标记让人注意到表格中没有填入数值的地方，从而防止出现空值。 He took down the lengthy list of produce prices and eradicated the zeros or "nulls". 他记下了冗长的农产品价格清单，并消除了零或"空值"。 |
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