total-pressure gradient

例句：

1. 1. The total pressure gradient is a critical factor in determining the direction of airflow.
   总压梯度是决定气流方向的关键因素。
2. 2. The total pressure gradient can be used to calculate the speed of sound in gases.
   总压梯度可以用来计算气体中声速的速度。
3. 3. The total pressure gradient affects the stability of atmospheric systems.
   总压梯度影响大气系统的稳定。