飞机的下降与上升一样，是分段进行，下降时产生的颠簸可能是紊流造成的，因为在下降过程中，常常不可避免地要穿过云层。
Why does turbulence occur in descending?
The descending of the airplane, similar to the climbing, is operated by stages. Flying through clouds is inevitable during descending, and the airing convection caused turbulence. |
