如何使用 "variable" 造句

1. Another variable is the increasing number of student nationalities .
另一个变量是生源地的不断增加。
2. The obvious answer is a variable size display .
一个显而易见的解决方案就是可变大小的显示屏。
3. Payment systems are unfathomably complex and highly variable .
支付系统复杂到让人难以理解且充满变数。
4. Monetary policy affects the economy with long and variable lags .
货币政策对经济的影响存在长期多变的滞后效应。
5. What values does the local variable r take on during the calculation ?
在计算过程中局部变量r保持的是什么值?