mutable相关的词根或词缀是: mut

Some design problems are easier to solve with mutable objects .

有一些设计问题还是使用易变对象比较容易解决。

We could have used a val with a mutable type , like listbuffer .

我们也可以使用val和一个可变的类型，比如listbuffer。

Functional programming is especially useful for concurrency , since it eliminates the need to synchronize access to mutable state .

函数式编程对于并发特别有用，因为它摒弃了对易变状态的同步访问。

Scala supports this model with its actors library , but it allows for both mutable and immutable variables .

scala通过actors库来支持这种模式，但是它同时允许mutable（易变的）和immutable（不易变的）变量。

This screensaver includes mutable music and adjustable speed .

这个屏幕保护程序，包括易变的音乐和调速。