20-02-08 一项追踪研究43代老鼠的试验表明，比起那些原本相对安静的老鼠的后代，那些原本相对活跃的老鼠的后代跑轮子的所花时间要比它们长两倍。 An experiment tracking mice for 43 generations finds that progeny of those that initially were more active are spending th...