The first time a rat was placed in the maze , it would usually wander slowly up and down the center aisle after the barrier slid away , snif ng in corners and scratching at walls .

当一只小鼠第一次被放入迷宫时，在屏障被移走后它通常会在迷宫的中央通道里缓慢地挪来挪去，在角落里嗅一嗅，在墙上扒一扒。