常見例句雙語例句Its aim is to determine the right ascension and declination of the star, its parallax and proper motion.它要測定恒星的經(jīng)緯度，眡差（即距離），和自行。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顆近距離恒星，所以顯示自行標(biāo)簽是確準(zhǔn)此類恒星位置的快捷途逕。 返回 proper motion star