科学 · 太空系统与地球历史 · 7
您的孩子在 7 岁左右正在学习科学中的太空系统与地球历史内容，并逐步掌握相关知识与技能。
Your child is learning that Earth changes over time — some changes happen quickly like earthquakes and volcanoes, while others like erosion and mountain building take millions of years.
您的孩子在 7 岁左右正在学习科学中的太空系统与地球历史内容，并逐步掌握相关知识与技能。
Your child is learning that Earth changes over time — some changes happen quickly like earthquakes and volcanoes, while others like erosion and mountain building take millions of years.