proper motion

基本解释

Conditional word can send fur clothing cleaners and dyers clean glazing also can buy proper motion of leather brightening agent to be fur clothing glazing from the shop.
有条件的话，可送皮衣洗染店清洁上光，也可以从商店购买皮革光亮剂自行为皮衣上光。
The genre proper motion, such as listening to music, exercise, conditioning sentiment, enhance physical fitness, contribute to the prevention and treatment of premature ejaculation.
进行恰当的体裁运动，如听音乐，磨炼身体，调理情操，加强体质，有助于防治早泄。
High proper motion normally indicates a nearby star, so displaying proper motion labels is a quick way of spotting such stars.
高自行通常表示是一颗近距离恒星，所以显示自行标签是确准此类恒星位置的快捷途径。

Special projectors can also be used to show the effect of proper motion, which causes the shapes of the constellations to change over time.
ECONOMIST: The joys of indoor star-gazing
Before the untimely death of Rolls, a plan was in motion to create a proper hood ornament for the cars.
FORBES: The Rolls-Royce Spirit of Ecstasy

the very small continuous change in the direction of motion of a star relative to the sun. It is determined from its radial and tangential motion