level down
1．make level by lowering the height of 铲平；弄平
That path is too high；level it down from here．那条路太高，从这里把它铲平。
2．lower；reduce 降低；减低
We must make sure the expansion of higher education does not level down university standards．我们一定要做到既发展高等教育又不降低大学水平。