They monitored kids between ages 8 and 10 playing in a lab, and set up situations that would elicit laughter, such as falling block towers and squeaky balloons.
他们设置一些能引人发笑的情景，比如积木塔倒塌或吱吱响的气球，对在实验室里玩的八至十岁的孩子进行监测。
They monitored kids between ages 8 and 10 playing in a lab, and set up situations that would elicit laughter, such as falling block towers and squeaky balloons.
他们设置一些能引人发笑的情景，比如积木塔倒塌或吱吱响的气球，对在实验室里玩的八至十岁的孩子进行监测。
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