1. In programming, mutable variables are those that can be changed during the course of the program.
在编程中，可变变量是指在程序执行过程中可以改变的变量。

2. The mutable nature of social media platforms makes it difficult to prevent the spread of misinformation.
社交媒体平台的易变特性使得防止谣言传播变得困难。