level of a field

例句：

1. 1. The level of the river has dropped significantly since the flood.
   自从洪水过后，河流的水平已经大幅下降。
2. 2. The level of education in this region is still quite low.
   该地区的教育水平仍然很低。
3. 3. The new policy aims to level the playing field for all students.
   新政策旨在为所有学生提供一个公平的学习环境。