为何有的伞头是螺旋稳定的，有的不是？
动态全失速是指当伞头在飞行员背后的时候进入全失速。
A dynamic full stall is performing a full stall when the glider is behind the pilot.
领舞的伞头要善于领唱传统的歌词以及因地制宜即兴编唱新词，以适应不同场合的需要。
The umbrella holder must be good at singing traditional songs and compo sing new songs impromptu so that they can meet the demand in different places.
应用推荐