单词	[粒子]轨道
释义	[粒子]轨道racetrack
随便看	television receive-only television, receive only television receive-only earth station television, receive only {=tvro} television receiver television receiver/monitor television receiving antenna television reception television reconnaissance television recording television region television relaying television relay station television relay system television repeater television report television rights television room televisions television safe action area television satellite television--satellite television scan television scanning television screen