有迹象表明，这两种类型的睡眠，有梦和无梦的，在很大程度上取决于动物的生活习惯，食肉动物在统计上是更容易做梦超过猎物，依次更加有可能经历无梦的睡眠。

Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in genera seem to sleep very little.

youdao

有迹象表明，这两种类型的睡眠，有梦和无梦的，在很大程度上取决于动物的生活习惯，食肉动物在统计上是更容易做梦超过猎物，依次更加有可能经历无梦的睡眠。

Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in genera seem to sleep very little.

youdao