you are sad, it comes to sit on your
feet. Does it really know your
feeling（情绪）？ Scientists （科学
家）in Hungary （匈 牙利）said
yes.The scientists tested （测试）
11 dogs. The dogs listened todifferent sounds from people.Some were laughing・ Some werecrying. When the dogs listened tosounds of laughing, their brains（大脑）became more active （活跃
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