The natural divisions of the year.
In many countries they are:
• Spring• Summer• Fall / Autumn• Winter
But some countries experience different seasons such as Dry and Wet in the tropics
数学辞典收录了1200条数学词条,基本涵盖了常用数学知识及数学英语单词词组的翻译及用法,是数学学习的有利工具。