But then the key differences in that seventh test trial when you close the box on, then the kangaroo start grappling around often with their claws or their snouts to get the food open, and it becomes immediately apparent it's closed.
但是在那第七次測試試驗中的關鍵差異,當你把盒子關上時,那麼袋鼠就開始經常用爪子或鼻孔抓來抓去,把食物打開,馬上就會發現它已經關上了。