[天]?恒星周期
sidereal period (恒星周期): Ti= 27.32 days synodic period (朔望周期): Ty=29.53 days
?公转恒星周期
公转恒星周期(sidereal period), 此释义来源于网络辞典。
恒星周期
If it misses this window, further opportunities occur at intervals of 23 hours and 56 minutes a period known as a sidereal day.
ECONOMIST: A new satellite will test Einstein's magnum opus
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。