level infection

例句：

1. 1. The level of the water is too high for me to swim in it.
   水的水平对我来说太高，我无法游泳。
2. 2. The company's performance has been on a steady upward trend.
   公司的绩效一直在稳步上升。
3. 3. The new policy will level the playing field for all employees.
   新政策将为所有员工提供一个平等的竞争环境。