科学 · 力与运动 · 9
您的孩子在 9 岁左右正在学习科学中的力与运动内容，并逐步掌握相关知识与技能。
Your child is learning about gravity and forces that resist motion like friction and air resistance, while discovering how simple machines like levers and pulleys can make tasks easier.
您的孩子在 9 岁左右正在学习科学中的力与运动内容，并逐步掌握相关知识与技能。
Your child is learning about gravity and forces that resist motion like friction and air resistance, while discovering how simple machines like levers and pulleys can make tasks easier.