explained sum of squares

例句：

1. 1. The engineer explained the problemto the team members.
   工程师向团队成员解释了这个问题。
2. 2. The scientist calculated the sum of squares for the experiment.
   科学家计算了实验的平方和。
3. 3. The math teacher explained theconcept of square roots to the students.
   数学老师向学生解释了平方根的概念。