The need to sleep near fire and in larger groups for warmth and safety could have allowed these early humans to get the most out of their sleep in the shortest possible time.
由于睡觉时需要靠近火和更大的人群保持温暖和安全，这可能使得早期人类尽可能在最短时间内睡得最好。
The need to sleep near fire and in larger groups for warmth and safety could have allowed these early humans to get the most out of their sleep in the shortest possible time.
由于睡觉时需要靠近火和更大的人群保持温暖和安全，这可能使得早期人类尽可能在最短时间内睡得最好。
应用推荐