秋天来了英语翻译为"autumn has arrived"。

这个短语来源于英语中秋天的名称"autumn"，"has arrived"表示时间的到来。

例句：

The leaves are changing color, autumn has arrived.

(树叶正在变色，秋天来了。)

I can feel the crispness in the air, autumn has arrived.

(我能感受到空气中的清冷，秋天来了。)

The days are getting shorter, autumn has arrived.

(白天变得越来越短，秋天来了。)