对不可变数据的更改包括构建数据新版本并从新版本开始工作。
Modifying immutable data consists of building a new version of the data and working from the new version.
具体来说，线程安全是指适当地协调对被多个线程访问的可变数据的访问。
Specifically, thread safety is about properly coordinating access to mutable data that is accessed by multiple threads.
不可变数据是许多侧重于并发性的语言的关键方面，因为它有如此好的属性。
Immutable data is a key aspect of many languages that focus on concurrency because it has such nice properties.
不可变数据是不能更改的，因此读取不可变数据无需用到锁，即使有多个线程读取时也是如此。
Immutable data cannot be changed and thus reading immutable data does not require locks, even when multiple threads are reading.
在考虑每个节点都是一个不可变数据结构的节点树时，我们必须考虑如何修改树内的一个节点或多个节点，而不必更改整个树。
When considering a tree of nodes where each node is an immutable data structure, we must consider how to modify a node or nodes inside the tree without modifying the entire tree.
可变数据，包括日志文件及打印池。
这仅适用于可变数据。
函数编程可以避免使用状态和可变数据，并改为强调函数的应用。
Functional programming avoids state and mutable data, and instead emphasizes the application of functions.
不可变数据在生产进行中必须确保完好无损，也就是不能被任何不相关的个人或集体进行删改。
Fixed data shall be protected against erasure or alteration during the manufacturing process such that it cannot be modified or deleted by an outside entity.
针对电子商务中对可变数据结构存储和处理的应用要求，提出了一种通用的数据存储模型及其处理框架。
This paper introduced a general data storing and processing model, which fit to the changeable data structure in E-business.
可变数据出版是一种新型的出版方式。本文对其内涵、对出版的意义以及可变数据出版的实现技术，进行了研究和探讨。
Varied data publishing is a new publishing way. This paper covers its concept, meaning to publishing industry and the technology to realize in practice.
这意味着以函数式语言编写多线程应用程序要容易得多，因为不可变数据结构与线程交互起来非常自然，因而代码可以很简洁。
This means that it is much easier to write multi-threading applications in functional languages because immutable data structures inherently interact cleanly with threads.
对于多媒体业务，当我们让传输时间是可变数据速率的函数时，该方案即可找出当前用户组的最优数据速率集，以使系统的传输时间最小。
When the time is expressed as a function of various data rates, the optimum set of data rates for concurrent user groups to achieve minimum transmission time can be derived.
对于多媒体业务，当我们让传输时间是可变数据速率的函数时，该方案即可找出当前用户组的最优数据速率集，以使系统的传输时间最小。
When the time is expressed as a function of various data rates, the optimum set of data rates for concurrent user groups to achieve minimum transmission time can be derived.
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