Now that we've looked briefly at implementation, let's turn to the heart of this article: how two singletons can exist simultaneously.
前面已经简单地介绍了单例模式的实现方式，现在让我们进入主题：两个单例对象如何同时存在？
Since multiple versions of a bundle can co-exist simultaneously, one could deploy and maintain multiple versions of a web service at the same time.
由于一个包的多个版本能够共存，因此人们可以同时部署和维护多个版本的Web服务。
The parameter estimation problem in parameter adjustment model is considered when outliers and ill-conditioning exist simultaneously.
讨论了测量平差中粗差和病态性同时存在时的参数估计问题。
Because logical reasoning process and cognitive process exist simultaneously, science inquiry can not be separated from logical reasoning process.
逻辑推理过程与事物的认识过程同时存在，科学探究离不开逻辑推理过程。
In this paper, we introduce a new scheduling model in which both exponential time-dependent learning effect and position-based learning effect exist simultaneously.
本文考虑指数学习效应和位置学习效应同时发生的新的排序模型。
As an example of refinement of detail: A logic system may have two opposing inputs, e. g. , a command to open and a command to close, which do not normally exist simultaneously;
作为细节改进的示例：逻辑系统可以具有两个相反的输入，例如，通常不同时存在的打开命令和关闭命令；
It is a progress that auxiliary words and mood words exist simultaneously in function words, which relatively conform to the actual situation of function words in modern Chinese.
虚词中助词和语气词并立是一种进步，比较符合现代汉语虚词的实际情况。
For every enterprise, risks and opportunities of market exist simultaneously, and the key point is how to make full use of advantages and create advantages to avoid risks and grasp opportunities.
对于每个企业来言，市场的风险和机遇总是并存的，关键是如何利用自身优势或创造优势来回避风险，把握机会。
For every enterprise, risks and opportunities of market exist simultaneously, and the key point is how to make full use of advantages and create advantages to avoid risks and grasp opportunities.
对于每个企业来言，市场的风险和机遇总是并存的，关键是如何利用自身优势或创造优势来回避风险，把握机会。
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