The leaves fall in autumn.

秋天叶子落下。

同一单元的其他句子

• My favourite season is spring.我最喜欢的季节是春天。
• I like summer because of the beach.我喜欢夏天因为海滩。
• Autumn leaves are very colourful.秋天的叶子非常多彩。
• Winter is cold and snowy.冬天又冷又多雪。
• Do you like spring flowers?你喜欢春天的花吗？