In the second experiment meant topit the mice's hunger against their fear, hungry mice were placed in a cage that had certain "fox-scented" areas and other places that smelled safer.
Its successor, on the other hand, appeared topit key socioeconomic groups in a life-or-death struggle and was widely seen by contemporary observers as marking a historical departure.
另一方面,它的继任者似乎让关键的社会经济群体陷入生死斗争,被当代观察家广泛视为历史背离的标志。
3
In the second experiment meant topit the mice's hunger against their fear, hungry mice were placed in a cage that had certain "fox scented" areas and other places that smelled safer.