lag behindretrograde[5retrEu^reid]adj.倒退的v.倒退retrograderet.ro.gradeAHD:[rµt“r…-gr³d”] D.J.[6retr*7gre!d]K.K.[6rWtr*7gred]adj.（形容词）Moving or tending backward.后退的：向后移动的或向后倾的Opposite to the usual order; inverted or reversed.颠倒的：与通常顺序相对的；倒转的或颠倒的Reverting to an earlier or inferior condition.退化的：回到较早或较低级的状态的Astronomy 【天文学】 Of or relating to the orbital revolution or axial rotation of a planetary or other celestial body that moves clockwise from east to west, in the direction opposite to most celestial bodies.逆行的：行星或其它天体沿轨道旋转或绕轴旋转的，该天体顺着与大多数天体相反的方向由东向西顺时针运动Of or relating to the brief, regularly occurring, apparently backward movement of a planetary body in its orbit as viewed against the fixed stars, caused by the differing orbital velocities of Earth and the body observed.后退的：行星所做的短暂有规律的运动的，以静止星体为参照物进行观察时，这种运动显然是后退的，这是由地球和所观察天体具有不同的轨道速度引起的Archaic Opposed; contrary.【古语】 对立的：相对的；相反的v.intr.（不及物动词）ret.ro.grad.ed,ret.ro.grad.ing,ret.ro.grades To move or seem to move backward.See Synonyms at recede 后退，逆行：向后移动或似乎向后移动参见 recedeTo decline to an inferior state; degenerate.退步：降至较低级的状态；退化
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