在齐次方程组求解的过程中，初等行变换的运算过程有时显得并不简便。
In the solving process of homogeneous equation set, the operational procedure for elementary line transformation is sometimes not simple and convenient as it seems to be.
只有一半的学生能完成初等教育，还有很多孩子不能掌握基础语言和数学运算及生活技能。
Only half of the students who begin primary school complete the cycle, leaving far too many children without basic mastery of language and mathematics and the acquisition of life skills.
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