秋裤的英文是 "autumn pants"，来源是因为这种裤子通常在秋季穿着。以下是一些例句：

I bought a new pair of autumn pants. 我买了一条新的秋裤。

These autumn pants are made of high-quality material. 这些秋裤由优质面料制成。

I usually wear autumn pants when the weather is cooler. 当天气变冷时，我通常会穿秋裤。