At high altitude you have jet streams, and the wind velocity is not the same at all altitudes.
在高海拔处会有高速气流，风速在不同的海拔处，并不相同。
2
All particles reduce the jetvelocity half-width, but the effects on the streamwise mean velocity profiles are complicated.
所有的颗粒都降低了射流速度半宽，但对流向平均速度剖面的影响比较复杂。
3
The study indicated that in the clinical application of color Doppler valve regurgitation, color Doppler jet area has a certain semiquantitative value with a small range of jetvelocity.