four-year-olds and five-year-olds are able to pass this task.
四岁五岁大的儿童则能够通过这个任务
耶鲁公开课 - 心理学导论课程节选
Three-year-olds find this difficult.
三岁大的儿童会觉得这个任务很难
Two-year-olds find this difficult.
两岁大的儿童会觉得这个任务很难
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模块上移
模块下移
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