水平的

例句：

1. 1. The water level has risen by 5 meters since last year.
   水位自去年以来上升了5米。
2. 2. The student's performance is at a level that can be considered average.
   学生的表现在可被认为平均水平。
3. 3. The road was level, and the traffic flowed smoothly.
   道路平坦，交通流畅。