水平

The two students are about level in mathematics. / The two students are on a level in mathematics.

The general level of the students was not high.

We must increase production levels.

highest/lowest level; maximum/minimum standard

professional level

level of education

average/ordinary level

low/high level

moral/nutrition level

be varied in standard/competence

fall short of standard

improve the standard of living

be above/below the ordinary/general level

catch up with and surpass the advanced level

attain/reach the advanced world level; be up to the advanced world standard

be on the upmost level

keep level (with)

horizontal distance

horizontal direction