yán jiū / rén yuán / bǐ jiào / le / liǎng / zhǒng / jiào xué / fāng fǎ / de / fāng chā / yǐ / pàn duàn / xué shēng / chéng jì / de / bō dòng / chéng dù

研究人员比较了两种教学方法的方差，以判断学生成绩的波动程度。

The researchers compared the variances of the two teaching methods to assess how much the students' scores fluctuated.