To measure canine psychology, researchers trained dogs to recognize that bowls on one side of a room contained food, while bowls on the other side were empty.

为了把握狗的心理，研究人员通过训练使狗明白放在房屋一侧的碗里有食物，另一侧的碗却是空的。

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To measure canine psychology, researchers trained dogs to recognize that bowls on one side of a room contained food, while bowls on the other side were empty.

为了把握狗的心理，研究人员通过训练使狗明白放在房屋一侧的碗里有食物，另一侧的碗却是空的。

youdao