periapsis
英 [perɪ'æpsɪs]
美 [ˌperɪ'æpsɪs]
词性
名词；
基本解释
n.[天]近拱点
网络释义
轨道力学术语，表示轨道上物体与中心物体之间的最近距离；
例证
1、The spacecraft reached its periapsis and began its descent towards the planet.
2、The periapsis of the moon's orbit around the Earth is about 363,300 kilometers.
2、The periapsis of the moon's orbit around the Earth is about 363,300 kilometers.