null
英 [n?l]
美[n?l]
- adj. 无效的，无价值的；等于零的
- n. 零，[数] 空
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