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单词 Necessary condition
释义

Necessary condition

英语例句库

In this paper, the limit is broken through and a more general necessary and sufficient condition for schedulability is proposed.

突破这一限制,提出了更具一般性的可调度性分析判定充要条件。

The metallogenic material was from deep alkalic basaltic magma, and the pulsatory invasion was the necessary metallogenic condition of the ore deposit.

成矿物质源于碱性玄武岩浆,基性次火山岩浆多次脉动式入侵是矿床形成的必要条件。

Thus, the boron-bearing rock system and the magnesian rocks are the foundation of the borate deposits, whereas regional metamorphism and migmatitization and tectonism are the necessary conditions.

含硼岩系、镁质容矿岩石是硼矿形成的物质基础,区域变质及混合岩化作用、构造活动是硼矿形成的必要条件。

By using Taylor's formula, the article deduces the sufficient condition of the existent extreme value and the necessary condition of the inexistent extreme value of trinary function.

通过利用泰勒公式推导出判断三元函数极值存在的充分条件和极值不存在的必要条件。

原声例句
VOA Daily Standard 2017年12月合集

Acknowledging this as a fact is a necessary condition for achieving peace.

承认这一点为事实是实现和平的必要条件。

CRI在线 2021年11月合集

He also called for political preparations and necessary conditions for the next phase of exchanges.

他还呼吁为下一阶段的交流做好政治准备和必要条件。

经济学人(汇总)

A necessary condition for its rise was the discovery in 1967 of diamonds by De Beers, a mining giant.

1967年,矿业巨头戴比尔斯发现了钻石,这是其崛起的必要条件。

飘(原版)

We realized that in those first dreadful days after the war, it was perhaps necessary, conditions being what they were.

我们知道在战后初期那些可怕的日子,那样做是必要的,因为环境就是那样嘛。

CRI在线 2022年4月合集

Officials say the decision was taken to create mutual trust and the necessary conditions for further talks to take place.

其官员表示,作出这一决定是为增加互信,并为进一步谈判创造必要条件。

TED演讲(音频版) 2022年7月合集

A climate-safe future is a necessary condition for peace.

气候安全的未来是和平的必要条件。

Engvid超级外教Alex-课程合辑

So, it creates the necessary conditions for the public protests.

因此, 它为公众抗议创造了必要条件。

经济学人-国际

“Adherence to fiscal discipline is a necessary condition for growth, ” he told an audience at the London Stock Exchange on January 18th.

1月18日,蒙蒂在伦敦证券交易所对一名在场观众说道:“遵守财政纪律是保证经济增长的必要条件,然而,只有这一个条件是不够的。”

VOA Special 2017年7月合集

He asks the country to “create necessary conditions for resuming dialogue and negotiations.”

他要求该国“为恢复对话和谈判创造必要条件”。

TED演讲(音频版) 2022年7月合集

We often hear that a climate-safe future is a necessary condition for peace.

我们经常听说气候安全的未来是和平的必要条件。

TED演讲(音频版)精选

Moreover, evals and debugging are really just necessary, not sufficient, conditions for safety.

此外,评估和调试实际上只是安全的必要条件,而不是充分条件。

TED-Ed(视频版)

For instance, having an atmosphere is a necessary condition for being a habitable planet.

例如,拥有大气层是成为宜居行星的必要条件。

经济学人(汇总)

He says he has thought for some time that ceasefire negotiations were needed, and that this bill is a necessary condition for us to negotiate.

他说停火谈判的必要性已经在他脑子里有一段时间了,这部法案为我们谈判提供了必要的条件。

考研英语一真题2017—2020

On the one hand, it's a necessary condition for many worthwhile things: child care, friendships, etc .

另一方面,对诸如儿童看护、友谊等许多有价值的事情来说,信任是一项必要条件。

南方与北方(下)

And now she had learnt that not only to will, but also to pray, was a necessary condition in the truly heroic.

现在她明白了, 不仅要立志, 而且要祈祷, 是真正英雄的必要条件。

TED演讲(视频版) 2020年8月合集

So it is folly to create an economy that makes a university diploma a necessary condition of dignified work and a decent life.

因此,创造一种使大学文凭成为有尊严的工作和体面生活的必要条件的经济是愚蠢的。

就业、利息和货币通论(上)

There is, however, a necessary condition failing which the existence of a liquidity-preference for money as a means of holding wealth could not exist.

然而,如果没有一个必要条件, 货币流动性偏好作为持有财富的手段就不可能存在。

上帝之死

It is, in fact, the first prerequisite to the appearance of the exceptional: it is a necessary condition to a high degree of civilization.

事实上,它是出现例外的首要条件:它是高度文明的必要条件。

苏菲的世界(原版)

We say that food and water are necessary conditions of life for man and beast. Had we not had these conditions we would not have existed.

我们说食物和水是人和动物生存的必要条件。 如果我们没有这些条件, 我们就不会存在。

就业、利息和货币通论(上)

For whilst the weakening of credit is sufficient to bring about a collapse, its strengthening, though a necessary condition of recovery, is not a sufficient condition.

因为虽然信用减弱足以导致崩溃, 但信用增强虽然是复苏的必要条件, 但并不是充分条件。

中文百科

充分必要条件 Necessity and sufficiency

(重定向自Necessary condition)

充分及必要条件sufficient and necessary condition)简称「充要条件」。

在逻辑学中:

因此:

英语百科

Necessity and sufficiency 充分必要条件

(重定向自Necessary condition)
The sun being above the horizon is a necessary condition for direct sunlight; but it is not a sufficient condition as something else may be casting a shadow, e.g. in the case of an eclipse.
That a train runs on schedule can be a sufficient condition for arriving on time (if one boards the train and it departs on time, then one will arrive on time); but it is not always a necessary condition, since there are other ways to travel (if the train does not run to time, one could still arrive on time through other means of transport).
Consider two logical statements S and N, such that S is sufficient for N (if S is true, then N must also be true). Figuratively, if we are within S then we are within N. It follows that S cannot be true unless N is true – i.e., that N is a necessary condition for S.
Dass ein Korb da ist, ist eine notwendige Bedingung, um Basketball spielen zu können – ohne ihn geht es nicht.

In logic, necessity and sufficiency are implicational relationships between statements. The assertion that one statement is a necessary and sufficient condition of another means that the former statement is true if and only if the latter is true. That is, the two statements must be either simultaneously true or simultaneously false. In ordinary English, 'necessary' and 'sufficient' indicate relations between conditions or states of affairs, not statements. Being a male sibling is a necessary and sufficient condition for being a brother. Fred's being a male sibling is necessary and sufficient for the truth of the statement that Fred is a brother.

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更新时间:2025/6/22 21:43:19