satellite visibility period visibility of satellite
Related Translations:
可见: 1.(可以看见; 可以想见) it is thus clear [evident; obvious] that 短语和例子这么明显的错字他都没看出来, 可见他很粗心。 the character was obviously wrong but he didn't pick it out. it shows how careless he was. 只有几个学生通过了考试,