integer ideal

例句：

1. 1.The number of students in the class is 30.
   班上的学生人数是30。
2. 2.The teacher asked us to count the units on the scale.
   老师让我们数量尺上的单位。
3. 3.In mathematics, integers are numbers that have only whole numbers as their digits.
   在数学中，整数是指只有整数作为其数字的数。