查询词典 if and only if

An epistemic proposition is true if and only if it is a member of corresponding world.

一个认知命题是真的，当且仅当它属于相应的认知世界之中。

Two strings are equal if and only if they consist of the same sequence of UCS characters.

字符串被定义为 ucs 字符序列。

We prove that a diagram can be drawn with conicoid sequentially if and only if it can be described by a set of triangular equations of degree less than nine.

同时证明了一个三维几何图形可以用平面、球面和圆锥曲面构造出来的充分必要条件是这个三维几何图形可以用一个三角化的次数小于9的代数方程组来描述。

According to parameterized complexity theory, a decidable parameterized problem is fixed-parameter tractable if and only if it can be kernelized.

在参数计算与复杂性理论中，一个参数问题是固定参数可解的问题当且仅当该问题是可核心化的。

It is because of cases like these that many philosophers have been tempted to say that knowledge is dispositional; we know something if and only if we know what to do with it once it comes into awareness.

这是因为这样的案件，许多哲学家一直很想说，知识是特质；我们知道的东西当且仅当我们知道如何处理它一旦进入意识。

Every thing has its solution, if and only if you can be farseeing .

每个问题都有其解决之道，只要你把目光放得远一点！

It is shown that the whole system is managerially effective if and only if that all sub-processes are managerially effective.

理论分析表明：链型组织系统管理有效的充分必要条件是系统内的每个子系统均管理有效。

First ,it is showed that the t2st ructures on both ends are nondegenerate if and only if the t2st ructure on middle is nondegenerate.

首先证明了两端三角范畴上的t2结构是非退化的当且仅当中间三角范畴上的t2结构是非退化的。

It is proved that there is no strong arbitrage in the proportional case if and only if there is no strong arbitrage in the nonproportional case.

我们证明了不成比例交易费的市场不存在强套利机会等价于成比例交易费的市场不存在强套利机会。

Especially it is pointed out that a system is quadratically stable under a switching sequence if and only if the system is asymptotically stable under a periodic switching sequence.

特别指出，一个系统可经切换达到二次稳定的充要条件是该系统可经周期切换渐近稳定。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷