The four seasons are spring, summer, autumn and winter. 四季是春季、夏季、秋季和冬季。

　　Seasons are different in various parts of the world. 各地的季节各不相同。

　　If it is winter in the northern part of the Earth, it is summer in the southern part of the years. 如果地球的北半球是冬季，那么南半球就是夏季。

　　Did you know that the southern part has Christmas in summer? 你知道南半球的圣诞节是在夏季吗？

　　If you are having a good time with snow in the winter, some people are enjoying swimming on the beach at the same time somewhere else. 如果你正在冬天玩雪，同一时间，某些地方的人可能正在海滩上游泳。