null是什么意思？

null

英[nʌl] 美[nʌl]

• adj. <术>零值的，等于零的，（协议） 无法律效力，失效的；

例句

• The contract was declared null and void. 合同被宣布无效。
• The court ruled that the claim was null and void. 法庭裁决此项要求无效.
• Rescinded civil acts shall be null and void from the very beginning. 被撤销的民事行为从行为开始起无效.
• Rub - out: Computer code signifying null and used to delete. 擦去: 表示“无效”的电脑代码,用来作取消用.
• Truncate insignificant trailing zero when using null scale. 使用空刻度时截去多余的零结尾.
• A spokeswoman said the agreement had been declared null and void. 女发言人称该协议已宣布无效。
• In other words, null pointer values convey the notion of inexistent objects. 换句话说, 空指针值表达的意思是不存在的对象.
• The general event horizon formula of black hole is given from null hypersurface equation. 从零曲面方程出发,导出了黑洞视界面的普遍公式.
• It is shown that the proper acceleration of null geodesic with conjugate points approaches infinity. 具有共轭点的类光测地线的固有加速度趋于无穷大.
• When the galvanometer reads zero the circuit is in the null - balance position. 当检流计的读数为零时,电路处于零平衡位置.

同义词

• adj.
  null的同义词之：不存在的,空的,愚蠢的
  nonexistent, hollow, clear, blank, foolish, bare, inexistent, empty, inane, vacuous, senseless, unprofitable,
  null的同义词之：没用的
  inutile, piddling, immaterial, worthless, ineffectual, binding, trivial, invalid, unsubstantial, trifling, nugatory, not, inoperative, futile, no-good, purposeless, unavailing, inefficacious, valueless, good-for-nothing, insignificant, useless, inconsequential,
  null的同义词之：被删除的
  extinguished, effaced, expunged, destroyed, dissolved, exterminated, annihilated, extirpated, obliterated, eliminated,

柯林斯高阶英汉双解学习词典释义

• PHRASE
  (协议、宣言或选举结果)无法律效力的，无效的
  If an agreement, a declaration, or the result of an election is null and void, it is not legally valid.
  例句
  A spokeswoman said the agreement had been declared null and void... 女发言人称该协议已宣布无效。 The declaration was null and void as it was proclaimed in completely illegal circumstances. 该声明无效，因为它是在完全非法的情况下宣布的。

英汉词典释义

• adj.
  (协议) 无法律效力； 失效的
  The contract was declared null and void. 合同被宣布无效。

英英词典释义

• Noun
  1. 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"
• Adjective
  1. lacking any legal or binding force;
  "null and void"

行业词典

• 体育： 平跤；
  法律： 宣告无效；
  物理学： 零力系；null-force system；