downward force

例句：

1. 1. The elevator is designed to provide a downward force on the passengers.
   电梯设计用来对乘客施加向下的力。
2. 2.The physics experiment demonstrated the downward force of gravity.
   这个物理实验展示了重力的向下力。
3. 3.The car's brakes apply a downward force to slow down the vehicle.
   汽车的刹车装置施加向下的力量来减速车辆。