adj.拱(极)点的;
例句:
These results may be used to explain the two special phenomena in the motion of Hyperion, namely, the drawing back of the apsidal and the location of the conjunction of Titan-Hyperion around the aposaturnium.
根据结果,可解释土卫七运动中的两个特殊现象:拱线后退以及土卫七和土卫六的合只能发生在远心点。