basic counter

例句：

1. 1.This calculator has a basic counter for adding and subtracting numbers.
   这款计算器有一个基本的计数器，可以用于加法和减法运算。
2. 2. The teacher used the basic counter to help us understand the problem.
   老师使用基本计数器帮助我们理解这个问题。
3. 3.Basic counters are used in many industries, such as manufacturing and engineering.
   基本计数器在许多行业中都有应用，如制造业和工程。