当且仅当有可重复的科学证据证明蝾螈之眼有效时，蝾螈之眼才会进入小黑袋中。
Eye of newt goes into the little black bag, if and only if there is reproducible scientific evidence that it works.
当且仅当这些行为发生时，在上级和下级之间才存在一种权威关系。
When, and only when, these behaviors occur, does an authority relationship exist between the superior and subordinate.
这是正确的，因为上面对a和b 的奇偶性的推导是一个当且仅当命题。
This is true as the above derivation for a and b of opposite parity is an if and only if statement.
请注意：该文件当且仅当项目构建时生成。
Please note: This file is generated if and only if the project is built.
一条边是桥当且仅当它不包含在圈中。
这样推断，端点当且仅当资源更新时才会收到RSS条目片断。
Presumably the endpoint would then receive RSS item fragments when and only when that resource updated.
中国将承认美国的申索当且仅当返回美国原住民时。
China a would recognize the US's claim if and only if the US is returned to its natives.
当然了，我们当且仅当末日审判发生时才需要做这些。
以上练习表明当且仅当公园面积时，居民捐款的边际收益是为正。
The previous exercise shows that individual residents gain from their marginal contribution if and only if the park is smaller than.
当且仅当两个集合中的元素一一对应时，才称它们为等势。
Two sets are said to be equivalent if and only if they can be placed in one-to-one correspondence.
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。
An epistemic proposition is true if and only if it is a member of corresponding world.
当且仅当每个线程希望访问运行时的时候，按需创建VM对象。
A VM object is created at demand and only once for every thread that wants to access the runtime.
当且仅当这些行为发生时，在上级和下级之间才存在一种权威关系。
When, and only when, these behaviors occur does an authority relationship exist between the superior and subordinate.
把蝾螈眼放入黑色的小袋子，当且仅当有重复性的科学证据表明它的实用性）。
Eye of newt goes into the little black bag, if and only if there isreproducible scientific evidence that it works.
是右半遗传环当且仅当任一右R模的两个上平坦子模的和上平坦；
R is semihereditary ring if and only if the sum of two coflat submodules of every R module is coflat module;
当且仅当这两个条件元素都等于true时，才执行规则的结果元素。
Only when both conditional elements evaluate to true are the rule's consequence elements executed.
拟正则半群上的两个完全正则同余相等当且仅当它们的核正规系相同。
Completely regular congruence on an eventually regular semigroup is uniquely determined by its kernel normal system.
拟正则半群上的两个完全正则同余相等当且仅当它们的核正规系相同。
A Completely regular congruence on an eventually regular semigroup is uniquely determined by its kernel normal system.
一种布尔运算，当且仅当每个操作数都具有布尔值0时，其结果才具有布尔值0。
The Boolean operation whose result has the Boolean value 0 if and only if each operand has the Boolean value 0.
“所有这些当且仅当不同的国家愿意做他们必须做的——重组银行业——才会起作用，”他说。
“All this will work if, and only if, the different countries are likely to do what they have to do in terms of restructuring the banking sector, ” he said.
根据总体稳定性判据，闭环系统稳定，当且仅当所有的特征方程的根有负面真正的部分。
According to the General Stability Criterion, a closed loop system will be stable if and only if all the roots of the characterized equation have negative real parts.
在该书中，你会遇到许多这类定义——都是按照“X当且仅当y”这个模式建立起来的。
You will encounter many definitions of this sort in this book - set out in terms of the schema "x if and only if y."
为了能切身体会，您可以设计一个小测试程序，这个程序当且仅当期望的条件得到满足时才可以编译。
To see this yourself, design a small test program that will compile if and only if the desired condition is true.
一个环R∈（M）当且仅当R的每一个非零同态象或者包含一个非零M理想或者有本质理想。
A ring Re, (M) iff each nonzero homomorphic image of R either contains a nonzero M-ideal or has an essential ideal.
利用中介逻辑的完备性，本文证明了紧致性定理，即一理论有模型当且仅当其任一有穷子集有模型。
The compact theorem is proved, which states that theory T has model if and only if any finite subset of T has model.
类可以被用来指定原型属性集的类型，当且仅当它们被定义到相同的概要文件，或者在导入的概要文件中。
Classes can be used to specify the type of stereotype attributes only if they are defined in the same profile as the stereotype itself, or in an imported profile.
主要结论：当且仅当基本再生数小于等于时，系统存在唯一无病平衡点，且无病平衡点是全局渐近稳定。
The main conclusion drawn from this study is that: if and only if the basic productive number , the only disease-free equilibrium exists in the system and it is of global asymptotic stability.
这些索赔一起意味着行为在道德上是正确的，当且仅当该行为导致“为最大的幸福，因为共同的口号”说。
Together these claims imply that an act is morally right if and only if that act causes "the greatest happiness for the greatest number," as the common slogan says.
这些索赔一起意味着行为在道德上是正确的，当且仅当该行为导致“为最大的幸福，因为共同的口号”说。
Together these claims imply that an act is morally right if and only if that act causes "the greatest happiness for the greatest number," as the common slogan says.
应用推荐