[天]?分至周
... tropical month 分至月 tropical revolution 分至周 tropical year 回归年 ...
The other is a tropical import that only became a Swiss speciality after the Industrial Revolution.
BBC: The perfect trip: Switzerland
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。