短语词组短语nutation cone 章动锥forced nutation 强迫章动Nutation angle 章动角;盘旋角;弹丸攻角diurnal nutation [天]周日章动principal nutation [天]主章动nutation movement [植]转头运动nutation field [电子]旋场;翻译;垂头场英语Nutation reducing 消章 返回 nutation