英语语法分析

When French soldiers were stranded outside Rome one winter in the 16th century, they lay on the city's dunghills to soak up warmth from the fermenting matter.

在16世纪的一个冬天，当法国士兵被困在罗马城外时，他们躺在这座城市的粪堆上，靠它们的发酵取暖。