4.This curious, slobbery interaction with the world is what Piaget called the sensorimotor stage – the level of development where all knowledge is based on what you can perceive with your senses.
皮亚杰将这种与世界的好奇、口齿不清的互动称为感觉运动阶段——所有知识都基于你可以用你的感官感知的发展水平。机翻
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