null
英 [n?l]
美[n?l]
- adj. 無效的，無價(jià)值的；等于零的
- n. 零，[數(shù)] 空
實(shí)用場(chǎng)景例句
- A spokeswoman said the agreement had been declared null and void.
- 女發(fā)言人稱該協(xié)議已宣布無效。
柯林斯例句
- The agreement will be considered null and void.
- 該協(xié)議將被視作無效。
辭典例句
- When the galvanometer reads zero the circuit is in the null - balance position.
- 當(dāng)檢流計(jì)的讀數(shù)為零時(shí),電路處于零平衡位置.
辭典例句
- This null - balance system is usually more accurate than the direct - readout bridge.
- 這種調(diào)零系統(tǒng)通常比直讀電橋更精確.
辭典例句
- The court ruled that the claim was null and void.
- 法庭裁決此項(xiàng)要求無效.
辭典例句
- The operator O is the null operator.
- 算符O是零算符.
辭典例句
- This check is null and void.
- 本支票無效.
辭典例句
- This contract is null and void.
- 此合同無效.
辭典例句
- The null subset corresponds to the term 1.
- 空集則對(duì)應(yīng)于常數(shù)項(xiàng)1.
辭典例句
- The null result of the Michelson - Morley experiment suggests that the effects of the ether are undetectable.
- 邁克耳 孫- 莫雷實(shí)驗(yàn)的否定結(jié)果使人想到,以太的效應(yīng)是不能檢查到的.
辭典例句
- Whenever we reject the null hypothesis, the conclusion we do accept is called the alternative hypothesis.
- 無論何時(shí),拒絕無效假設(shè)時(shí), 我們所接受的結(jié)論叫做備擇假設(shè).
辭典例句
- The null result was directly related to a central postulate of the theory.
- 零結(jié)果都直接與理論的中心假設(shè)相聯(lián)系.
辭典例句
- A null - balance system is provided by balancing the magnetic forces by electrostatic forces.
- 零位平衡系統(tǒng)是靠靜電力來平衡磁力而造成的.
辭典例句
- The device provides extreme sensitivity through a small range around the null point.
- 此裝置在零點(diǎn)附近很小一段范圍內(nèi)具有極高的靈敏度.
辭典例句
- The term null hypothesis arose from earlier agricultural and medical applic ation of statistics.
- 無效假設(shè)這個(gè)概念產(chǎn)生于早期的統(tǒng)計(jì)學(xué)在農(nóng)業(yè)和醫(yī)學(xué)方面的應(yīng)用中.
辭典例句