实际发展水平与潜在发展水平之间的距离,前者由独立解决问题决定,后者由在成人指导下或与更有能力的同伴合作解决问题决定。
Love is a kind of patience.
Humility is the mark of a great leader.
确保和平的唯一方式就是随时准备战争。
The lightning that precedes the thunder is a common image of the warnings that come before calamity.