英汉词典

null 基本解释

• adj. 无效的，无价值的；等于零的
• n. 零，[数] 空

null 英文词源

null (adj.)

"void of legal force," 1560s, from Middle French nul, from Latin nullus "not any, none," from ne- "not, no" (see un-) + illus "any," diminutive of unus "one" (see one).

null 英文释义

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"

null 双语例句

1. A spokeswoman said the agreement had been declared null and void.

女发言人称该协议已宣布无效。

来自柯林斯例句

2. Failure. The NULL value has been passed as a parameter.

失败. 将空指针NULL传给了一个参数.

来自互联网

3. If mem block is NULL, pointer is ignored and free immediately returns.

如果NULL内存块,操作将被忽略并且函数立即返回.

来自互联网

4. This function returns the removed node on success, or NULL on failure.

这个函数如果执行成功,将返回被删除的子节点;如果执行失败, 将返回null[空值].

来自互联网

5. A pointer to a NULL - terminated string representing a device instance identifier.

指向一个以NULL结尾的字符串,象征设备实例描述符.

来自互联网

null 实用场景例句

A spokeswoman said the agreement had been declared null and void.

女发言人称该协议已宣布无效。

柯林斯例句

The agreement will be considered null and void.

该协议将被视作无效。

辞典例句

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.

辞典例句

This null - balance system is usually more accurate than the direct - readout bridge.

这种调零系统通常比直读电桥更精确.

辞典例句

The court ruled that the claim was null and void.

法庭裁决此项要求无效.

辞典例句

The operator O is the null operator.

算符O是零算符.

辞典例句

This check is null and void.

本支票无效.

辞典例句

This contract is null and void.

此合同无效.

辞典例句

The null subset corresponds to the term 1.

空集则对应于常数项1.

辞典例句

The null result of the Michelson - Morley experiment suggests that the effects of the ether are undetectable.

迈克耳 孙- 莫雷实验的否定结果使人想到,以太的效应是不能检查到的.

辞典例句

Whenever we reject the null hypothesis, the conclusion we do accept is called the alternative hypothesis.

无论何时,拒绝无效假设时, 我们所接受的结论叫做备择假设.

辞典例句

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.

辞典例句

A null - balance system is provided by balancing the magnetic forces by electrostatic forces.

零位平衡系统是靠静电力来平衡磁力而造成的.

辞典例句

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.

辞典例句

The term null hypothesis arose from earlier agricultural and medical applic ation of statistics.

无效假设这个概念产生于早期的统计学在农业和医学方面的应用中.

辞典例句