原文
But the overall difference between parents and non-parents after the post-partum period is not nearly as big as you might believe. On average, the German study, which looked at nearly 40,000 people in total, found that parents who had at least one child under six years old reported sleeping about seven hours per night. Non-parents received just 10 minutes more sleep per night, for women, and 14 minutes more per night, for men.