名词 summer 的意思是夏天，但 “Indian summer” 的意思不是 “印度夏天”，而指早秋中回热的天气，俗称 “秋老虎”。Indian summer 还可比喻人晚年幸福安宁的生活。

例句

September is usually chilly, but this year we are having an Indian summer.

九月通常比较冷了，但今年我们可是遇上了一个秋老虎。

This Indian summer means that I don't even need to wear a coat yet.

今年的这个秋老虎意味着到现在还不用穿外套。

He enjoyed a real Indian summer in the last years of his career as a footballer - that's when he won the most trophies.

他在过去的几年中迎来了自己足球事业的第二个春天，也是他获得奖杯数最多的日子。