答案：一年有四个季节，分别是春天、夏天、秋天和冬天。每个季节的特点是：内容如下：

Answer: There are four seasons in a year, which are spring, summer, autumn and winter. The characteristics of each season are:

- Spring: Spring is the season when the weather becomes warmer and plants start to grow again. Spring is usually associated with rebirth, renewal and freshness. Some of the activities that people enjoy in spring are gardening, hiking, picnicking and celebrating festivals such as Easter and Holi.
- Summer: Summer is the hottest season of the year, when the days are long and the nights are short. Summer is usually associated with fun, leisure and relaxation. Some of the activities that people enjoy in summer are swimming, surfing, camping and traveling.
- Autumn: Autumn is the season when the leaves change color and fall from the trees. Autumn is usually associated with harvest, change and nostalgia. Some of the activities that people enjoy in autumn are picking apples, carving pumpkins, baking pies and celebrating festivals such as Halloween and Thanksgiving.
- Winter: Winter is the coldest season of the year, when the days are short and the nights are long. Winter is usually associated with snow, ice and darkness. Some of the activities that people enjoy in winter are skiing, snowboarding, ice skating and celebrating festivals such as Christmas and New Year.