actual decimal point

例句：

1. 1. The engineer calculated the actual decimal point of the measurement.
   工程师计算了测量的实际小数点。
2. 2.The math teacher explained the concept of the actual decimal point to the students.
   数学老师向学生解释了实际小数点的概念。
3. 3.The scientist used an actual decimal point to measure the accuracy of his experiment.
   科学家使用实际小数点来测量他的实验的准确性。