屋子里回响着孩子们的笑声。
长时间看带有预录笑声的电视节目，只能让孩子们学会被动地处理信息。
And hours of watching TV shows with canned laughter only teaches kids to process information in a passive way.
男孩子们在外面席地而坐，从他们发出的阵阵笑声来看，他们玩得很开心。
Outside the boys were sitting on the ground and, judging by the gales of laughter, they were having a ball.
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