This study investigated the cognitive process of object 3-5 year old children.

本文探讨了3- 5岁儿童对物体的认知及对他人的认知过程。

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This toy is not suitable for children under 5 year old.

这个玩具不适合五岁以下的小朋友。

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This toy is not suitable for children under 5 year old.

这个玩具不适合五岁以下的小朋友。

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