1) drop ball
下坠球
2) drop service
发下坠球
3) Throw it underarm.
投下坠球。
4) Falling into the Earth
坠落地球
5) droop stop
扬起下坠
1.
In order to investigate the dynamic characteristics of blade impact to droop stop,a moderate deflection beam model is adopted to deal with the elastic deformations,and the finite rotation is introduced to take account of the rigid motions around hinges.
针对铰接式旋翼桨叶扬起下坠碰撞问题,采用中等变形梁模型,同时引入有限转角模拟桨叶绕铰的刚性运动。
6) falling phenomenon
下坠现象
补充资料：下坠
1.向下落。 2.医家谓腹部感觉沉重，似欲大便。 3.情绪低落。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条