释义
n. 轨道,常轨,眼眶 v. 绕轨道而行,进入轨道,盘旋
例句
1. The spacecraft is in orbit around the moon. 该航天器在绕月球轨道运行。 2. How many spacecrafts are orbiting the moon? 有多少航天器绕月球轨道飞行？